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CVE-2026-64114 #16525
openeuler-ci-bot创建于  7月24日
openeuler-ci-bot
openeuler-ci-bot成员
7月24日 创建

一、漏洞信息
漏洞编号:CVE-2026-64114
漏洞归属组件:kernel
漏洞归属的版本:4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.12.33,6.18.18,6.4.0,6.6.0
CVSS评分:
BaseScore:7.8 High
Vector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
漏洞简述:
In the Linux kernel, the following vulnerability has been resolved:ipv4: raw: reject IP_HDRINCL packets with ihl < 5raw_send_hdrinc() validates that the caller-supplied IPv4 headerfits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(iph)) { / fix up saddr, tot_len, id, csum, transport_header */ }It does not, however, reject ihl < 5. For such a packet the if (iphlen >= sizeof(*iph)) branch is skipped, leaving thecrafted iphdr untouched, but the packet is still handed to__ip_local_out() and onward. Downstream consumers that readiph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() inparticular subtracts sizeof(struct iphdr) from top_iph->ihl * 4and passes the (signed-int-negative, then cast to size_t)result to memcpy(), producing an OOB access of length close toSIZE_MAX and a host kernel panic.An IPv4 header with ihl < 5 is malformed by definition (RFC 791: Internet Header Length is the length of the internet header in32 bit words ... Note that the minimum value for a correct headeris 5. ). The kernel should not be willing to inject such apacket into its own output path.Reject iphlen < sizeof(*iph) alongside the existing iphlen > length check. This matches the principle that locallyconstructed packets that re-enter the IP stack must pass the samebasic sanity tests that a foreign packet would be subjected to.Once this lands, the if (iphlen >= sizeof(*iph)) wrapper aroundthe fixup branch becomes redundant; left in place to keep thepatch minimal and backport-friendly. A follow-up can unwrap it.Note that commit 86f4c90a1c5c ( ipv4, ipv6: ensure raw socketmessage is big enough to hold an IP header ) ensures the messagebuffer is large enough to hold an iphdr, but does not constrainthe self-reported iph->ihl.Reachability: the malformed packet source is any caller withCAP_NET_RAW, including an unprivileged process in a user+netnamespace on a kernel with CONFIG_USER_NS=y. The reproduced AHcrash also requires a matching xfrm AH policy on the outgoingroute; a container granted CAP_NET_ADMIN can install that stateand policy in its netns. Loopback bypasses xfrm_output, so thetrigger uses a real netdev.Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 withmemcpy_orig at the crash site. Same shape reproduces inside arootless Docker container with --cap-add NET_ADMIN on a stockdistro kernel.
漏洞公开时间:2026-07-20 00:17:52
漏洞创建时间:2026-07-24 18:57:08
漏洞详情参考链接:
https://nvd.nist.gov/vuln/detail/CVE-2026-64114

更多参考(点击展开)
参考来源 参考链接 来源链接
https://git.kernel.org/stable/c/bbe0be67de296176e7243c76e3d9f02f6ae9ff0b
https://git.kernel.org/stable/c/915fab69823a14c170dbaa3b41978768e0fe62fc
https://lore.kernel.org/linux-cve-announce/2026071923-CVE-2026-64114-d584@gregkh/T
https://bugzilla.redhat.com/show_bug.cgi?id=2502486
https://www.cve.org/CVERecord?id=CVE-2026-64114
https://git.kernel.org/stable/c/bc20dbd48c26e743f7e0845020c11ed2ce8b15ee
https://git.kernel.org/stable/c/3c5411fa4944ed99af3d9d1de750ea8169b6dac9
https://git.kernel.org/stable/c/1065b9efa4126df559b03a849c139ecfae92cd25
https://lore.kernel.org/linux-cve-announce/2026071923-CVE-2026-64114-d584@gregkh/T/#u
https://git.kernel.org/stable/c/5a564f737ec54d63e8ee221d3ff396d07586d464
https://nvd.nist.gov/vuln/detail/CVE-2026-64114
https://git.kernel.org/stable/c/7725cd3b471740fd23d25ed1da722c671fb2a5d3
https://git.kernel.org/stable/c/145e9afa5b905229b4788bb72c3255f5a5f77508

漏洞分析指导链接:
https://atomgit.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
七彩瞬析开源风险感知平台
漏洞补丁信息:

详情(点击展开)
影响的包 修复版本 修复补丁 问题引入补丁 来源
https://git.kernel.org/stable/c/bbe0be67de296176e7243c76e3d9f02f6ae9ff0b cvelistv5
https://git.kernel.org/stable/c/915fab69823a14c170dbaa3b41978768e0fe62fc cvelistv5
https://git.kernel.org/stable/c/bc20dbd48c26e743f7e0845020c11ed2ce8b15ee cvelistv5
https://git.kernel.org/stable/c/3c5411fa4944ed99af3d9d1de750ea8169b6dac9 cvelistv5
https://git.kernel.org/stable/c/1065b9efa4126df559b03a849c139ecfae92cd25 cvelistv5
https://git.kernel.org/stable/c/5a564f737ec54d63e8ee221d3ff396d07586d464 cvelistv5
https://git.kernel.org/stable/c/7725cd3b471740fd23d25ed1da722c671fb2a5d3 cvelistv5
https://git.kernel.org/stable/c/145e9afa5b905229b4788bb72c3255f5a5f77508 cvelistv5

二、漏洞分析结构反馈
影响性分析说明:
In the Linux kernel, the following vulnerability has been resolved:ipv4: raw: reject IP_HDRINCL packets with ihl < 5raw_send_hdrinc() validates that the caller-supplied IPv4 headerfits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(iph)) { / fix up saddr, tot_len, id, csum, transport_header */ }It does not, however, reject ihl < 5. For such a packet the"if (iphlen >= sizeof(*iph))" branch is skipped, leaving thecrafted iphdr untouched, but the packet is still handed to__ip_local_out() and onward. Downstream consumers that readiph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() inparticular subtracts sizeof(struct iphdr) from top_iph->ihl * 4and passes the (signed-int-negative, then cast to size_t)result to memcpy(), producing an OOB access of length close toSIZE_MAX and a host kernel panic.An IPv4 header with ihl < 5 is malformed by definition (RFC 791:"Internet Header Length is the length of the internet header in32 bit words ... Note that the minimum value for a correct headeris 5."). The kernel should not be willing to inject such apacket into its own output path.Reject "iphlen < sizeof(*iph)" alongside the existing"iphlen > length" check. This matches the principle that locallyconstructed packets that re-enter the IP stack must pass the samebasic sanity tests that a foreign packet would be subjected to.Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper aroundthe fixup branch becomes redundant; left in place to keep thepatch minimal and backport-friendly. A follow-up can unwrap it.Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socketmessage is big enough to hold an IP header") ensures the messagebuffer is large enough to hold an iphdr, but does not constrainthe self-reported iph->ihl.Reachability: the malformed packet source is any caller withCAP_NET_RAW, including an unprivileged process in a user+netnamespace on a kernel with CONFIG_USER_NS=y. The reproduced AHcrash also requires a matching xfrm AH policy on the outgoingroute; a container granted CAP_NET_ADMIN can install that stateand policy in its netns. Loopback bypasses xfrm_output, so thetrigger uses a real netdev.Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 withmemcpy_orig at the crash site. Same shape reproduces inside arootless Docker container with --cap-add NET_ADMIN on a stockdistro kernel.The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.
openEuler评分:
7.8
Vector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
受影响版本排查(受影响/不受影响):
1.master(6.18.40):不受影响
2.openEuler-20.03-LTS-SP4(4.19.90):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS-Next(6.6.0):不受影响
5.openEuler-24.03-LTS-SP1(6.6.0):受影响
6.openEuler-24.03-LTS-SP3(6.6.0):受影响
7.openEuler-24.03-LTS-SP4(6.6.0):受影响
8.openEuler-22.03-LTS-SP3(5.10.0):受影响
9.openEuler-24.03-LTS(6.6.0):受影响
10.openEuler-24.03-LTS-SP2(6.6.0):受影响

修复是否涉及abi变化(是/否):
1.master(6.18.40):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP4(5.10.0):否
4.openEuler-24.03-LTS-Next(6.6.0):否
5.openEuler-24.03-LTS-SP1(6.6.0):否
6.openEuler-24.03-LTS-SP3(6.6.0):否
7.openEuler-24.03-LTS-SP4(6.6.0):否
8.openEuler-22.03-LTS-SP3(5.10.0):否
9.openEuler-24.03-LTS(6.6.0):否
10.openEuler-24.03-LTS-SP2(6.6.0):否

原因说明:
1.master(6.18.40):不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4(4.19.90):漏洞仍在分析中
3.openEuler-22.03-LTS-SP4(5.10.0):正常修复
4.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-SP1(6.6.0):正常修复
6.openEuler-24.03-LTS-SP3(6.6.0):正常修复
7.openEuler-24.03-LTS-SP4(6.6.0):正常修复
8.openEuler-22.03-LTS-SP3(5.10.0):不修复-超出修复范围
9.openEuler-24.03-LTS(6.6.0):不修复-超出修复范围
10.openEuler-24.03-LTS-SP2(6.6.0):不修复-超出修复范围

likedislike
openeuler-ci-botopeneuler-ci-bot成员
7月24日 添加了label:CVE/UNFIXED
openeuler-ci-bot
openeuler-ci-bot成员
7月24日 评论:

issue处理注意事项:
1. 提交正常修复分支的修复PR时,必须关联当前issue,否则无法关闭当前issue;
2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容;
3. 以下为模板中需要填写完整的内容, 请复制到评论区回复;
注: 内容的关键词(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否), 原因说明)不能省略,省略后cve-manager将无法正常解析填写内容.


影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响):
1.master(6.18.18):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP4(5.10.0):
4.openEuler-24.03-LTS-Next(6.6.0):
5.openEuler-24.03-LTS-SP1(6.6.0):
6.openEuler-24.03-LTS-SP3(6.6.0):
7.openEuler-24.03-LTS-SP4(6.6.0):

修复是否涉及abi变化(是/否):
1.master(6.18.18):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP4(5.10.0):
4.openEuler-24.03-LTS-Next(6.6.0):
5.openEuler-24.03-LTS-SP1(6.6.0):
6.openEuler-24.03-LTS-SP3(6.6.0):
7.openEuler-24.03-LTS-SP4(6.6.0):

原因说明:
1.master(6.18.18):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP4(5.10.0):
4.openEuler-24.03-LTS-Next(6.6.0):
5.openEuler-24.03-LTS-SP1(6.6.0):
6.openEuler-24.03-LTS-SP3(6.6.0):
7.openEuler-24.03-LTS-SP4(6.6.0):


原因说明填写请参考下方表格(注意:版本是否受影响和版本的原因说明必须对应,例如master版本分支受影响,那原因说明只能是受影响对应的原因之一!):

分支状态
原因说明 使用场景
受影响 正常修复 受影响且需要修复(包含升级版本修复)的漏洞;
受影响且已经修复的漏洞(历史修复PR也需要关联issue);
若因特殊原因无法修复,应修改原因说明为【不修复-特殊原因】,并在安委会备案相关情况。
受影响 漏洞仍在分析中 已关注到相关漏洞,正在处理,未明确漏洞影响和修复方案。
受影响 暂不修复-暂无解决方案或补丁 当前没有可用的修复或补救措施。【影响性分析】中应包含有关为什么没有修复或补救措施的详细说明、上游相关PR等。
受影响 不修复-超出修复范围 没有漏洞的修复计划。当版本停维、软件包宣布生命周期终止或弃用使用。
受影响 不修复-特殊原因导致不再修复 如存在其他特殊情况不修复相关漏洞,或评估后无法升级修复,应在openEuler社区安全委员会例会进行说明备案。
【影响性分析】中应包含不发布修复的详细说明、特殊情况还应有安委会会议纪要。
不受影响 不受影响-组件不存在 软件不受影响,因为易受攻击的组件不在产品中。
不受影响 不受影响-已有内置的内联控制或缓解措施 内置的内联控制或缓解措施可防止攻击者利用漏洞
不受影响 不受影响-漏洞代码不能被攻击者触发 易受攻击的组件存在,并且该组件包含易受攻击的代码。但是,易受攻击的代码的使用方式使得攻击者无法进行任何预期的攻击。
不受影响 不受影响-漏洞代码不在执行路径 易受影响的代码在执行过程中不可访问,包括产品的非预期状态。产品不使用也不执行的组件。
不受影响 不受影响-漏洞代码不存在 产品不受影响,因为漏洞背后的代码在产品中不存在。与component_not_present不同的是,有问题的组件存在,但由于某种原因(例如安全的编译器选项)使漏洞的特定代码不存在于组件中。

issue处理具体操作请参考:
https://atomgit.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://docs.atomgit.com/docs/help/home/org_project/pullrequests/pr-related-issue

likedislike
devstation-robot
devstation-robot
7月24日 评论:

检测到新建 CVE Issue,CVE-ID: CVE-2026-64114

你可以通过以下两种方式使用 CVE 修复服务:

  1. 分支影响分析

    • 在本 Issue 下评论:/analysis_branches
    • 系统将自动分析各个分支是否受影响,并在本 Issue 下给出表格形式的分析结果;
  2. 在指定分支上创建 PR(修复提交)

    • 在本 Issue 下按如下格式评论(字段均为必填,每个字段单独一行):
/create_pr

branch: OLK-6.6 OLK-5.10
name: dev
email: dev@devstation.com
  • 说明:
    • branch: 需要创建 PR 的目标分支列表,例如 OLK-6.6 OLK-5.10
    • name: PR 签名人姓名(如责任人或安全负责人);
    • email: PR 签名人邮箱;

系统会根据上述信息自动在指定分支上创建 PR,并在本 Issue 下反馈结果。

provided by DevStation.

likedislike
openeuler-ci-botopeneuler-ci-bot成员
7月24日 添加了label:sig/Kernel
openeuler-ci-bot
openeuler-ci-bot成员
7月24日 评论:

Welcome To openEuler Community

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likedislike
openeuler-ci-bot
openeuler-ci-bot成员
7月24日 评论:
参考网址 关联pr 状态 补丁链接
https://www.opencve.io/cve/CVE-2026-64114NoneNonehttps://git.kernel.org/stable/c/bc20dbd48c26e743f7e0845020c11ed2ce8b15ee
https://git.kernel.org/stable/c/915fab69823a14c170dbaa3b41978768e0fe62fc
https://git.kernel.org/stable/c/3c5411fa4944ed99af3d9d1de750ea8169b6dac9
https://git.kernel.org/stable/c/bbe0be67de296176e7243c76e3d9f02f6ae9ff0b
https://git.kernel.org/stable/c/1065b9efa4126df559b03a849c139ecfae92cd25
https://git.kernel.org/stable/c/145e9afa5b905229b4788bb72c3255f5a5f77508
https://git.kernel.org/stable/c/5a564f737ec54d63e8ee221d3ff396d07586d464
https://git.kernel.org/stable/c/7725cd3b471740fd23d25ed1da722c671fb2a5d3
https://security-tracker.debian.org/tracker/CVE-2026-64114NoneNonehttps://git.kernel.org/linus/915fab69823a14c170dbaa3b41978768e0fe62fc
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2026-64114
https://nvd.nist.gov/vuln/detail/CVE-2026-64114NoneNonehttps://git.kernel.org/stable/c/bc20dbd48c26e743f7e0845020c11ed2ce8b15ee
https://git.kernel.org/stable/c/915fab69823a14c170dbaa3b41978768e0fe62fc
https://git.kernel.org/stable/c/3c5411fa4944ed99af3d9d1de750ea8169b6dac9
https://git.kernel.org/stable/c/bbe0be67de296176e7243c76e3d9f02f6ae9ff0b
https://git.kernel.org/stable/c/1065b9efa4126df559b03a849c139ecfae92cd25
https://git.kernel.org/stable/c/145e9afa5b905229b4788bb72c3255f5a5f77508
https://git.kernel.org/stable/c/5a564f737ec54d63e8ee221d3ff396d07586d464
https://git.kernel.org/stable/c/7725cd3b471740fd23d25ed1da722c671fb2a5d3
https://ubuntu.com/security/CVE-2026-64114NoneNonehttps://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
https://discourse.ubuntu.com/c/project
https://git.kernel.org/linus/915fab69823a14c170dbaa3b41978768e0fe62fc

说明:补丁链接仅供初步排查参考,实际可用性请人工再次确认,补丁下载验证可使用CVE补丁工具
若补丁不准确,烦请在此issue下评论 '/report-patch 参考网址 补丁链接1,补丁链接2' 反馈正确信息,便于我们不断优化工具,不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

likedislike
hulk-ci-bot成员
7月24日 评论:

CVE-2026-64114

影响性分析说明:
In the Linux kernel, the following vulnerability has been resolved:

ipv4: raw: reject IP_HDRINCL packets with ihl < 5

raw_send_hdrinc() validates that the caller-supplied IPv4 header
fits within the message length:

iphlen = iph-&gt;ihl * 4;
err = -EINVAL;
if (iphlen &gt; length)
    goto error_free;

if (iphlen &gt;= sizeof(*iph)) {
    /* fix up saddr, tot_len, id, csum, transport_header */
}

It does not, however, reject ihl < 5. For such a packet the
"if (iphlen >= sizeof(*iph))" branch is skipped, leaving the
crafted iphdr untouched, but the packet is still handed to
__ip_local_out() and onward. Downstream consumers that read
iph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() in
particular subtracts sizeof(struct iphdr) from top_iph->ihl * 4
and passes the (signed-int-negative, then cast to size_t)
result to memcpy(), producing an OOB access of length close to
SIZE_MAX and a host kernel panic.

An IPv4 header with ihl < 5 is malformed by definition (RFC 791:
"Internet Header Length is the length of the internet header in
32 bit words ... Note that the minimum value for a correct header
is 5."). The kernel should not be willing to inject such a
packet into its own output path.

Reject "iphlen < sizeof(*iph)" alongside the existing
"iphlen > length" check. This matches the principle that locally
constructed packets that re-enter the IP stack must pass the same
basic sanity tests that a foreign packet would be subjected to.

Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper around
the fixup branch becomes redundant; left in place to keep the
patch minimal and backport-friendly. A follow-up can unwrap it.

Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socket
message is big enough to hold an IP header") ensures the message
buffer is large enough to hold an iphdr, but does not constrain
the self-reported iph->ihl.

Reachability: the malformed packet source is any caller with
CAP_NET_RAW, including an unprivileged process in a user+net
namespace on a kernel with CONFIG_USER_NS=y. The reproduced AH
crash also requires a matching xfrm AH policy on the outgoing
route; a container granted CAP_NET_ADMIN can install that state
and policy in its netns. Loopback bypasses xfrm_output, so the
trigger uses a real netdev.

Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 with
memcpy_orig at the crash site. Same shape reproduces inside a
rootless Docker container with --cap-add NET_ADMIN on a stock
distro kernel.

The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.

openEuler评分:(评分和向量)
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

受影响版本排查(受影响/不受影响):
1.master:不受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响
8.openEuler-24.03-LTS-SP2:受影响
9.openEuler-24.03-LTS-SP3:受影响
10.openEuler-24.03-LTS-SP4:受影响

修复是否涉及abi变化(是/否):
1.master:否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS-SP3:否
4.openEuler-22.03-LTS-SP4:否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-24.03-LTS-SP1:否
8.openEuler-24.03-LTS-SP2:否
9.openEuler-24.03-LTS-SP3:否
10.openEuler-24.03-LTS-SP4:否

原因说明:
1.master:不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:暂不修复-漏洞仍在分析中
3.openEuler-22.03-LTS-SP3:不修复-超出修复范围
4.openEuler-22.03-LTS-SP4:暂不修复-漏洞仍在分析中
5.openEuler-24.03-LTS:不修复-超出修复范围
6.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1:暂不修复-漏洞仍在分析中
8.openEuler-24.03-LTS-SP2:不修复-超出修复范围
9.openEuler-24.03-LTS-SP3:暂不修复-漏洞仍在分析中
10.openEuler-24.03-LTS-SP4:暂不修复-漏洞仍在分析中

likedislike
openeuler-ci-botopeneuler-ci-bot成员
7月24日 修改了issue 的描述
openeuler-ci-bot
openeuler-ci-bot成员
7月24日 评论:

@kazero00 经过 cve-manager 解析, 已分析的内容如下表所示:

状态 分析项目 内容
已分析 1.影响性分析说明 In the Linux kernel, the following vulnerability has been resolved:ipv4: raw: reject IP_HDRINCL packets with ihl < 5raw_send_hdrinc() validates that the caller-supplied IPv4 headerfits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(iph)) { / fix up saddr, tot_len, id, csum, transport_header */ }It does not, however, reject ihl < 5. For such a packet the"if (iphlen >= sizeof(*iph))" branch is skipped, leaving thecrafted iphdr untouched, but the packet is still handed to__ip_local_out() and onward. Downstream consumers that readiph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() inparticular subtracts sizeof(struct iphdr) from top_iph->ihl * 4and passes the (signed-int-negative, then cast to size_t)result to memcpy(), producing an OOB access of length close toSIZE_MAX and a host kernel panic.An IPv4 header with ihl < 5 is malformed by definition (RFC 791:"Internet Header Length is the length of the internet header in32 bit words ... Note that the minimum value for a correct headeris 5."). The kernel should not be willing to inject such apacket into its own output path.Reject "iphlen < sizeof(*iph)" alongside the existing"iphlen > length" check. This matches the principle that locallyconstructed packets that re-enter the IP stack must pass the samebasic sanity tests that a foreign packet would be subjected to.Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper aroundthe fixup branch becomes redundant; left in place to keep thepatch minimal and backport-friendly. A follow-up can unwrap it.Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socketmessage is big enough to hold an IP header") ensures the messagebuffer is large enough to hold an iphdr, but does not constrainthe self-reported iph->ihl.Reachability: the malformed packet source is any caller withCAP_NET_RAW, including an unprivileged process in a user+netnamespace on a kernel with CONFIG_USER_NS=y. The reproduced AHcrash also requires a matching xfrm AH policy on the outgoingroute; a container granted CAP_NET_ADMIN can install that stateand policy in its netns. Loopback bypasses xfrm_output, so thetrigger uses a real netdev.Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 withmemcpy_orig at the crash site. Same shape reproduces inside arootless Docker container with --cap-add NET_ADMIN on a stockdistro kernel.The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.
已分析 2.openEulerScore 7.8
已分析 3.openEulerVector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
已分析 4.受影响版本排查 master:不受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS-Next:不受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-24.03-LTS-SP3:受影响,openEuler-24.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP2:受影响
已分析 5.是否涉及abi变化 master:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-Next:否,openEuler-24.03-LTS-SP1:否,openEuler-24.03-LTS-SP3:否,openEuler-24.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-SP2:否
已分析 6.原因说明 master:不受影响-漏洞代码不能被攻击者触发,openEuler-20.03-LTS-SP4:漏洞仍在分析中,openEuler-22.03-LTS-SP4:漏洞仍在分析中,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-SP1:漏洞仍在分析中,openEuler-24.03-LTS-SP3:漏洞仍在分析中,openEuler-24.03-LTS-SP4:漏洞仍在分析中,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-24.03-LTS:不修复-超出修复范围,openEuler-24.03-LTS-SP2:不修复-超出修复范围

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

likedislike
openeuler-ci-botopeneuler-ci-bot成员
7月24日 issue状态由 待办的 改变为 进行中
openeuler-ci-botopeneuler-ci-bot成员
7月25日 修改了issue 的描述
hulk-ci-bot成员
7月29日 评论:

CVE-2026-64114

影响性分析说明:
In the Linux kernel, the following vulnerability has been resolved:

ipv4: raw: reject IP_HDRINCL packets with ihl < 5

raw_send_hdrinc() validates that the caller-supplied IPv4 header
fits within the message length:

iphlen = iph-&gt;ihl * 4;
err = -EINVAL;
if (iphlen &gt; length)
    goto error_free;

if (iphlen &gt;= sizeof(*iph)) {
    /* fix up saddr, tot_len, id, csum, transport_header */
}

It does not, however, reject ihl < 5. For such a packet the
"if (iphlen >= sizeof(*iph))" branch is skipped, leaving the
crafted iphdr untouched, but the packet is still handed to
__ip_local_out() and onward. Downstream consumers that read
iph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() in
particular subtracts sizeof(struct iphdr) from top_iph->ihl * 4
and passes the (signed-int-negative, then cast to size_t)
result to memcpy(), producing an OOB access of length close to
SIZE_MAX and a host kernel panic.

An IPv4 header with ihl < 5 is malformed by definition (RFC 791:
"Internet Header Length is the length of the internet header in
32 bit words ... Note that the minimum value for a correct header
is 5."). The kernel should not be willing to inject such a
packet into its own output path.

Reject "iphlen < sizeof(*iph)" alongside the existing
"iphlen > length" check. This matches the principle that locally
constructed packets that re-enter the IP stack must pass the same
basic sanity tests that a foreign packet would be subjected to.

Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper around
the fixup branch becomes redundant; left in place to keep the
patch minimal and backport-friendly. A follow-up can unwrap it.

Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socket
message is big enough to hold an IP header") ensures the message
buffer is large enough to hold an iphdr, but does not constrain
the self-reported iph->ihl.

Reachability: the malformed packet source is any caller with
CAP_NET_RAW, including an unprivileged process in a user+net
namespace on a kernel with CONFIG_USER_NS=y. The reproduced AH
crash also requires a matching xfrm AH policy on the outgoing
route; a container granted CAP_NET_ADMIN can install that state
and policy in its netns. Loopback bypasses xfrm_output, so the
trigger uses a real netdev.

Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 with
memcpy_orig at the crash site. Same shape reproduces inside a
rootless Docker container with --cap-add NET_ADMIN on a stock
distro kernel.

The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.

openEuler评分:(评分和向量)
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

受影响版本排查(受影响/不受影响):
1.master:不受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响
8.openEuler-24.03-LTS-SP2:受影响
9.openEuler-24.03-LTS-SP3:受影响
10.openEuler-24.03-LTS-SP4:受影响

修复是否涉及abi变化(是/否):
1.master:否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS-SP3:否
4.openEuler-22.03-LTS-SP4:否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-24.03-LTS-SP1:否
8.openEuler-24.03-LTS-SP2:否
9.openEuler-24.03-LTS-SP3:否
10.openEuler-24.03-LTS-SP4:否

原因说明:
1.master:不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:暂不修复-漏洞仍在分析中
3.openEuler-22.03-LTS-SP3:不修复-超出修复范围
4.openEuler-22.03-LTS-SP4:暂不修复-漏洞仍在分析中
5.openEuler-24.03-LTS:不修复-超出修复范围
6.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1:正常修复
8.openEuler-24.03-LTS-SP2:不修复-超出修复范围
9.openEuler-24.03-LTS-SP3:正常修复
10.openEuler-24.03-LTS-SP4:正常修复

likedislike
openeuler-ci-botopeneuler-ci-bot成员
7月29日 修改了issue 的描述
openeuler-ci-bot
openeuler-ci-bot成员
7月29日 评论:

@kazero00 经过 cve-manager 解析, 已分析的内容如下表所示:

状态 分析项目 内容
已分析 1.影响性分析说明 In the Linux kernel, the following vulnerability has been resolved:ipv4: raw: reject IP_HDRINCL packets with ihl < 5raw_send_hdrinc() validates that the caller-supplied IPv4 headerfits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(iph)) { / fix up saddr, tot_len, id, csum, transport_header */ }It does not, however, reject ihl < 5. For such a packet the"if (iphlen >= sizeof(*iph))" branch is skipped, leaving thecrafted iphdr untouched, but the packet is still handed to__ip_local_out() and onward. Downstream consumers that readiph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() inparticular subtracts sizeof(struct iphdr) from top_iph->ihl * 4and passes the (signed-int-negative, then cast to size_t)result to memcpy(), producing an OOB access of length close toSIZE_MAX and a host kernel panic.An IPv4 header with ihl < 5 is malformed by definition (RFC 791:"Internet Header Length is the length of the internet header in32 bit words ... Note that the minimum value for a correct headeris 5."). The kernel should not be willing to inject such apacket into its own output path.Reject "iphlen < sizeof(*iph)" alongside the existing"iphlen > length" check. This matches the principle that locallyconstructed packets that re-enter the IP stack must pass the samebasic sanity tests that a foreign packet would be subjected to.Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper aroundthe fixup branch becomes redundant; left in place to keep thepatch minimal and backport-friendly. A follow-up can unwrap it.Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socketmessage is big enough to hold an IP header") ensures the messagebuffer is large enough to hold an iphdr, but does not constrainthe self-reported iph->ihl.Reachability: the malformed packet source is any caller withCAP_NET_RAW, including an unprivileged process in a user+netnamespace on a kernel with CONFIG_USER_NS=y. The reproduced AHcrash also requires a matching xfrm AH policy on the outgoingroute; a container granted CAP_NET_ADMIN can install that stateand policy in its netns. Loopback bypasses xfrm_output, so thetrigger uses a real netdev.Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 withmemcpy_orig at the crash site. Same shape reproduces inside arootless Docker container with --cap-add NET_ADMIN on a stockdistro kernel.The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.
已分析 2.openEulerScore 7.8
已分析 3.openEulerVector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
已分析 4.受影响版本排查 master:不受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS-Next:不受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-24.03-LTS-SP3:受影响,openEuler-24.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP2:受影响
已分析 5.是否涉及abi变化 master:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-Next:否,openEuler-24.03-LTS-SP1:否,openEuler-24.03-LTS-SP3:否,openEuler-24.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-SP2:否
已分析 6.原因说明 master:不受影响-漏洞代码不能被攻击者触发,openEuler-20.03-LTS-SP4:漏洞仍在分析中,openEuler-22.03-LTS-SP4:漏洞仍在分析中,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-SP1:正常修复,openEuler-24.03-LTS-SP3:正常修复,openEuler-24.03-LTS-SP4:正常修复,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-24.03-LTS:不修复-超出修复范围,openEuler-24.03-LTS-SP2:不修复-超出修复范围

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

likedislike
openeuler-ci-bot
openeuler-ci-bot成员
7月29日 评论:

经过cve-manager解析,部分分支PR未合入,如红色字体所示:

原因说明:
1.master:不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:漏洞仍在分析中
3.openEuler-22.03-LTS-SP4:漏洞仍在分析中
4.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-SP1:正常修复(PR未合入)
6.openEuler-24.03-LTS-SP3:正常修复(PR未合入)
7.openEuler-24.03-LTS-SP4:正常修复(PR未合入)
8.openEuler-22.03-LTS-SP3:不修复-超出修复范围
9.openEuler-24.03-LTS:不修复-超出修复范围
10.openEuler-24.03-LTS-SP2:不修复-超出修复范围

likedislike
Llixiasong
7月30日 关联了pull request:Fix CVE-2026-64114
Llixiasong
13 天前 关联了pull request:Fix CVE-2026-64114
hulk-ci-bot成员
12 天前 评论:

CVE-2026-64114

影响性分析说明:
In the Linux kernel, the following vulnerability has been resolved:

ipv4: raw: reject IP_HDRINCL packets with ihl < 5

raw_send_hdrinc() validates that the caller-supplied IPv4 header
fits within the message length:

iphlen = iph-&gt;ihl * 4;
err = -EINVAL;
if (iphlen &gt; length)
    goto error_free;

if (iphlen &gt;= sizeof(*iph)) {
    /* fix up saddr, tot_len, id, csum, transport_header */
}

It does not, however, reject ihl < 5. For such a packet the
"if (iphlen >= sizeof(*iph))" branch is skipped, leaving the
crafted iphdr untouched, but the packet is still handed to
__ip_local_out() and onward. Downstream consumers that read
iph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() in
particular subtracts sizeof(struct iphdr) from top_iph->ihl * 4
and passes the (signed-int-negative, then cast to size_t)
result to memcpy(), producing an OOB access of length close to
SIZE_MAX and a host kernel panic.

An IPv4 header with ihl < 5 is malformed by definition (RFC 791:
"Internet Header Length is the length of the internet header in
32 bit words ... Note that the minimum value for a correct header
is 5."). The kernel should not be willing to inject such a
packet into its own output path.

Reject "iphlen < sizeof(*iph)" alongside the existing
"iphlen > length" check. This matches the principle that locally
constructed packets that re-enter the IP stack must pass the same
basic sanity tests that a foreign packet would be subjected to.

Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper around
the fixup branch becomes redundant; left in place to keep the
patch minimal and backport-friendly. A follow-up can unwrap it.

Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socket
message is big enough to hold an IP header") ensures the message
buffer is large enough to hold an iphdr, but does not constrain
the self-reported iph->ihl.

Reachability: the malformed packet source is any caller with
CAP_NET_RAW, including an unprivileged process in a user+net
namespace on a kernel with CONFIG_USER_NS=y. The reproduced AH
crash also requires a matching xfrm AH policy on the outgoing
route; a container granted CAP_NET_ADMIN can install that state
and policy in its netns. Loopback bypasses xfrm_output, so the
trigger uses a real netdev.

Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 with
memcpy_orig at the crash site. Same shape reproduces inside a
rootless Docker container with --cap-add NET_ADMIN on a stock
distro kernel.

The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.

openEuler评分:(评分和向量)
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

受影响版本排查(受影响/不受影响):
1.master:不受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响
8.openEuler-24.03-LTS-SP2:受影响
9.openEuler-24.03-LTS-SP3:受影响
10.openEuler-24.03-LTS-SP4:受影响

修复是否涉及abi变化(是/否):
1.master:否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS-SP3:否
4.openEuler-22.03-LTS-SP4:否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-24.03-LTS-SP1:否
8.openEuler-24.03-LTS-SP2:否
9.openEuler-24.03-LTS-SP3:否
10.openEuler-24.03-LTS-SP4:否

原因说明:
1.master:不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:暂不修复-漏洞仍在分析中
3.openEuler-22.03-LTS-SP3:不修复-超出修复范围
4.openEuler-22.03-LTS-SP4:正常修复
5.openEuler-24.03-LTS:不修复-超出修复范围
6.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1:正常修复
8.openEuler-24.03-LTS-SP2:不修复-超出修复范围
9.openEuler-24.03-LTS-SP3:正常修复
10.openEuler-24.03-LTS-SP4:正常修复

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12 天前 修改了issue 的描述
openeuler-ci-bot
openeuler-ci-bot成员
12 天前 评论:

@kazero00 经过 cve-manager 解析, 已分析的内容如下表所示:

状态 分析项目 内容
已分析 1.影响性分析说明 In the Linux kernel, the following vulnerability has been resolved:ipv4: raw: reject IP_HDRINCL packets with ihl < 5raw_send_hdrinc() validates that the caller-supplied IPv4 headerfits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(iph)) { / fix up saddr, tot_len, id, csum, transport_header */ }It does not, however, reject ihl < 5. For such a packet the"if (iphlen >= sizeof(*iph))" branch is skipped, leaving thecrafted iphdr untouched, but the packet is still handed to__ip_local_out() and onward. Downstream consumers that readiph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() inparticular subtracts sizeof(struct iphdr) from top_iph->ihl * 4and passes the (signed-int-negative, then cast to size_t)result to memcpy(), producing an OOB access of length close toSIZE_MAX and a host kernel panic.An IPv4 header with ihl < 5 is malformed by definition (RFC 791:"Internet Header Length is the length of the internet header in32 bit words ... Note that the minimum value for a correct headeris 5."). The kernel should not be willing to inject such apacket into its own output path.Reject "iphlen < sizeof(*iph)" alongside the existing"iphlen > length" check. This matches the principle that locallyconstructed packets that re-enter the IP stack must pass the samebasic sanity tests that a foreign packet would be subjected to.Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper aroundthe fixup branch becomes redundant; left in place to keep thepatch minimal and backport-friendly. A follow-up can unwrap it.Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socketmessage is big enough to hold an IP header") ensures the messagebuffer is large enough to hold an iphdr, but does not constrainthe self-reported iph->ihl.Reachability: the malformed packet source is any caller withCAP_NET_RAW, including an unprivileged process in a user+netnamespace on a kernel with CONFIG_USER_NS=y. The reproduced AHcrash also requires a matching xfrm AH policy on the outgoingroute; a container granted CAP_NET_ADMIN can install that stateand policy in its netns. Loopback bypasses xfrm_output, so thetrigger uses a real netdev.Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 withmemcpy_orig at the crash site. Same shape reproduces inside arootless Docker container with --cap-add NET_ADMIN on a stockdistro kernel.The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.
已分析 2.openEulerScore 7.8
已分析 3.openEulerVector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
已分析 4.受影响版本排查 master:不受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS-Next:不受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-24.03-LTS-SP3:受影响,openEuler-24.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP2:受影响
已分析 5.是否涉及abi变化 master:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-Next:否,openEuler-24.03-LTS-SP1:否,openEuler-24.03-LTS-SP3:否,openEuler-24.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-SP2:否
已分析 6.原因说明 master:不受影响-漏洞代码不能被攻击者触发,openEuler-20.03-LTS-SP4:漏洞仍在分析中,openEuler-22.03-LTS-SP4:正常修复,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-SP1:正常修复,openEuler-24.03-LTS-SP3:正常修复,openEuler-24.03-LTS-SP4:正常修复,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-24.03-LTS:不修复-超出修复范围,openEuler-24.03-LTS-SP2:不修复-超出修复范围

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

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openeuler-ci-bot
openeuler-ci-bot成员
12 天前 评论:

经过cve-manager解析,部分分支PR未合入,如红色字体所示:

原因说明:
1.master:不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:漏洞仍在分析中
3.openEuler-22.03-LTS-SP4:正常修复(PR未合入)
4.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-SP1:正常修复(PR未合入)
6.openEuler-24.03-LTS-SP3:正常修复(PR未合入)
7.openEuler-24.03-LTS-SP4:正常修复(PR未合入)
8.openEuler-22.03-LTS-SP3:不修复-超出修复范围
9.openEuler-24.03-LTS:不修复-超出修复范围
10.openEuler-24.03-LTS-SP2:不修复-超出修复范围

likedislike
openeuler-ci-botopeneuler-ci-bot成员
11 天前 修改了issue 的描述
openeuler-ci-botopeneuler-ci-bot成员
10 天前 修改了issue 的描述
Tengda Wu
Tengda Wu成员
4 天前 评论:

/check-issue

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openeuler-ci-bot
openeuler-ci-bot成员
4 天前 评论:

@kazero00 经过 cve-manager 解析, 已分析的内容如下表所示:

状态 分析项目 内容
已分析 1.影响性分析说明 In the Linux kernel, the following vulnerability has been resolved:ipv4: raw: reject IP_HDRINCL packets with ihl < 5raw_send_hdrinc() validates that the caller-supplied IPv4 headerfits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(iph)) { / fix up saddr, tot_len, id, csum, transport_header */ }It does not, however, reject ihl < 5. For such a packet the"if (iphlen >= sizeof(*iph))" branch is skipped, leaving thecrafted iphdr untouched, but the packet is still handed to__ip_local_out() and onward. Downstream consumers that readiph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() inparticular subtracts sizeof(struct iphdr) from top_iph->ihl * 4and passes the (signed-int-negative, then cast to size_t)result to memcpy(), producing an OOB access of length close toSIZE_MAX and a host kernel panic.An IPv4 header with ihl < 5 is malformed by definition (RFC 791:"Internet Header Length is the length of the internet header in32 bit words ... Note that the minimum value for a correct headeris 5."). The kernel should not be willing to inject such apacket into its own output path.Reject "iphlen < sizeof(*iph)" alongside the existing"iphlen > length" check. This matches the principle that locallyconstructed packets that re-enter the IP stack must pass the samebasic sanity tests that a foreign packet would be subjected to.Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper aroundthe fixup branch becomes redundant; left in place to keep thepatch minimal and backport-friendly. A follow-up can unwrap it.Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socketmessage is big enough to hold an IP header") ensures the messagebuffer is large enough to hold an iphdr, but does not constrainthe self-reported iph->ihl.Reachability: the malformed packet source is any caller withCAP_NET_RAW, including an unprivileged process in a user+netnamespace on a kernel with CONFIG_USER_NS=y. The reproduced AHcrash also requires a matching xfrm AH policy on the outgoingroute; a container granted CAP_NET_ADMIN can install that stateand policy in its netns. Loopback bypasses xfrm_output, so thetrigger uses a real netdev.Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 withmemcpy_orig at the crash site. Same shape reproduces inside arootless Docker container with --cap-add NET_ADMIN on a stockdistro kernel.The Linux kernel CVE team has assigned CVE-2026-64114 to this issue.
已分析 2.openEulerScore 7.8
已分析 3.openEulerVector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
已分析 4.受影响版本排查 master:不受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS-Next:不受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-24.03-LTS-SP3:受影响,openEuler-24.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP2:受影响
已分析 5.是否涉及abi变化 master:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-Next:否,openEuler-24.03-LTS-SP1:否,openEuler-24.03-LTS-SP3:否,openEuler-24.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-SP2:否
已分析 6.原因说明 master:不受影响-漏洞代码不能被攻击者触发,openEuler-20.03-LTS-SP4:漏洞仍在分析中,openEuler-22.03-LTS-SP4:正常修复,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-SP1:正常修复,openEuler-24.03-LTS-SP3:正常修复,openEuler-24.03-LTS-SP4:正常修复,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-24.03-LTS:不修复-超出修复范围,openEuler-24.03-LTS-SP2:不修复-超出修复范围

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

likedislike
openeuler-ci-bot
openeuler-ci-bot成员
4 天前 评论:

经过cve-manager解析,部分分支PR未合入,如红色字体所示:

原因说明:
1.master:不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:漏洞仍在分析中
3.openEuler-22.03-LTS-SP4:正常修复
4.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-SP1:正常修复(PR未合入)
6.openEuler-24.03-LTS-SP3:正常修复(PR未合入)
7.openEuler-24.03-LTS-SP4:正常修复(PR未合入)
8.openEuler-22.03-LTS-SP3:不修复-超出修复范围
9.openEuler-24.03-LTS:不修复-超出修复范围
10.openEuler-24.03-LTS-SP2:不修复-超出修复范围

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