Open
CVE-2026-96808 #42
z60071986Add on  19 days ago
z60071986
19 days ago Create

一、漏洞信息
漏洞编号:CVE-2026-96808
漏洞归属组件:flatpak
漏洞归属的版本:1.0.3,1.10.2,1.15.12,1.15.6,1.16.1,1.18.2,1.18.4
CVSS评分:
BaseScore:0.0 None
Vector:
漏洞简述:
In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session s directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation.
漏洞公开时间:2026-09-24 01:17:25
漏洞创建时间:2026-10-20 15:23:41
漏洞详情参考链接:
https://nvd.nist.gov/vuln/detail/CVE-2026-96808

更多参考(点击展开)

无

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:
其他
漏洞补丁信息:

详情(点击展开)

无

二、漏洞分析结构反馈
影响性分析说明:
In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session s directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation.(GHSA-qrwq-7qwx-q9rp,上游 1.18.1 修复:a3583bc/b00c7b5/4ddb5dc/e7f96b4,flatpak-1.16.x 分支提供 LTS backport;官方公告受影响范围 ≤1.18.0)补充说明:- openEuler-20.03-LTS-SP4(1.0.3):上游 1.0.3 源码树(2018-10 发布)不含 revokefs writer(该代码 2019 年才引入),漏洞代码不存在,判定不受影响;- openEuler-24.03-LTS-Next(1.10.2):backport PR !170 已关闭未合入,需重新提交(可基于上游 flatpak-1.16.x 分支 37fb84e/4d1eb21/076f77a/769ad56 backport);- openEuler-24.03-LTS-SP1(1.10.2):当前无已合入修复 PR(PR !166 仅含 CVE-2026-96807 补丁,未覆盖 revokefs/writer.c);- openEuler-24.03-LTS-SP3(1.10.2):backport PR !171 评审中未合入。
openEuler评分:
7.4
Vector:CVSS:3.1/AV:L/AC:H/PR:N/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(1.18.4):受影响
2.openEuler-20.03-LTS-SP4(1.0.3):不受影响
3.openEuler-22.03-LTS-SP4(1.10.2):受影响
4.openEuler-24.03-LTS-Next(1.10.2):受影响
5.openEuler-24.03-LTS-SP1(1.10.2):受影响
6.openEuler-24.03-LTS-SP3(1.10.2):受影响
7.openEuler-24.03-LTS-SP4(1.10.2):受影响

修复是否涉及abi变化(是/否):
1.master(1.18.4):否
2.openEuler-20.03-LTS-SP4(1.0.3):否
3.openEuler-22.03-LTS-SP4(1.10.2):否
4.openEuler-24.03-LTS-Next(1.10.2):否
5.openEuler-24.03-LTS-SP1(1.10.2):否
6.openEuler-24.03-LTS-SP3(1.10.2):否
7.openEuler-24.03-LTS-SP4(1.10.2):否

原因说明:
1.master(1.18.4):正常修复
2.openEuler-20.03-LTS-SP4(1.0.3):不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP4(1.10.2):正常修复
4.openEuler-24.03-LTS-Next(1.10.2):暂不修复-暂无解决方案或补丁
5.openEuler-24.03-LTS-SP1(1.10.2):暂不修复-暂无解决方案或补丁
6.openEuler-24.03-LTS-SP3(1.10.2):暂不修复-暂无解决方案或补丁
7.openEuler-24.03-LTS-SP4(1.10.2):正常修复

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19 days ago Modify description of issue
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19 days ago Assign lyn1001 as responsible person
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19 days ago Assign Charlie_li1、lostway1、z60071986 as responsible person, remove original responsible person: lyn1001
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openeuler-ci-botCollaborators
19 days ago Comments:

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(1.18.4):
2.openEuler-20.03-LTS-SP4(1.0.3):
3.openEuler-22.03-LTS-SP4(1.10.2):
4.openEuler-24.03-LTS-Next(1.10.2):
5.openEuler-24.03-LTS-SP1(1.10.2):
6.openEuler-24.03-LTS-SP3(1.10.2):
7.openEuler-24.03-LTS-SP4(1.10.2):

修复是否涉及abi变化(是/否):
1.master(1.18.4):
2.openEuler-20.03-LTS-SP4(1.0.3):
3.openEuler-22.03-LTS-SP4(1.10.2):
4.openEuler-24.03-LTS-Next(1.10.2):
5.openEuler-24.03-LTS-SP1(1.10.2):
6.openEuler-24.03-LTS-SP3(1.10.2):
7.openEuler-24.03-LTS-SP4(1.10.2):

原因说明:
1.master(1.18.4):
2.openEuler-20.03-LTS-SP4(1.0.3):
3.openEuler-22.03-LTS-SP4(1.10.2):
4.openEuler-24.03-LTS-Next(1.10.2):
5.openEuler-24.03-LTS-SP1(1.10.2):
6.openEuler-24.03-LTS-SP3(1.10.2):
7.openEuler-24.03-LTS-SP4(1.10.2):


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 暂不修复-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

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19 days ago Added label: sig/Programming-language
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19 days ago Comments:

Welcome To openEuler Community

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19 days ago Added label: CVE/UNFIXED
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openeuler-ci-botCollaborators
19 days ago Comments:
参考网址 关联pr 状态 补丁链接
https://www.opencve.io/cve/CVE-2026-96808NoneNonehttps://github.com/flatpak/flatpak/commit/a3583bc87d4f86c2794ff879ea56fce95b0b0b5f
https://github.com/flatpak/flatpak/commit/b00c7b5073a25bdc34653642de543b5ef6fe0225
https://github.com/flatpak/flatpak/commit/4ddb5dc0de1bd25e52627f520a49063d94f79377
https://github.com/flatpak/flatpak/commit/e7f96b4d1533f735ace2ea21dbf770e8d4be465a
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2026-96808
https://security-tracker.debian.org/tracker/CVE-2026-96808NoneNonehttps://github.com/flatpak/flatpak/commit/a3583bc87d4f86c2794ff879ea56fce95b0b0b5f
https://github.com/flatpak/flatpak/commit/e7f96b4d1533f735ace2ea21dbf770e8d4be465a
https://github.com/flatpak/flatpak/commit/b00c7b5073a25bdc34653642de543b5ef6fe0225
https://github.com/flatpak/flatpak/commit/4ddb5dc0de1bd25e52627f520a49063d94f79377
https://github.com/flatpak/flatpak/commit/076f77a4775490b2aef43f4e01eeee9aa965bd21
https://github.com/flatpak/flatpak/commit/37fb84ec00005ce3e368f7a5afb9743aedea24a2
https://github.com/flatpak/flatpak/commit/4d1eb212237069681b1f994e2b5b61e40015050f
https://github.com/flatpak/flatpak/commit/769ad563bae82b948496a7edffa5eb3f71d0cc72
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2026-96808
https://nvd.nist.gov/vuln/detail/CVE-2026-96808
https://ubuntu.com/security/CVE-2026-96808

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

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openeuler-ci-botCollaborators
19 days ago Comments:

@z60071986 CVE信息从NVD同步成功, 稍后请重新加载页面.

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19 days ago Modify description of issue
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19 days ago Removed responsible person lostway1、z60071986
infra_team
18 days ago Comments:

🔍 CVE 项目匹配性分析结果

CVE: CVE-2026-96808

针对分支: master

结果: ❌ 不匹配

原因: CVE-2026-96808 真实存在(NVD totalResults=1、MITRE PUBLISHED、OSV、上游 GHSA-qrwq-7qwx-q9rp 网页均确认),组件 Flatpak 与包名 flatpak 匹配;但受影响范围为 < 1.18.1(revokefs writer 符号链接路径穿越,CWE-61,修复 commit a3583bc/b00c7b5/4ddb5dc/e7f96b4 于 1.18.1 合入),master 分支当前版本 1.18.4 已高于修复版本,且已逐 commit 验证 1.18.4 源码 revokefs/writer.c 中修复代码实际存在(chase_parent/glnx_chaseat、symlinkat(to_parent_fd,to_name)、O_NOFOLLOW openat),故当前版本不受影响

说明:

  • 此结论仅针对上述分支;仓库包含多个分支,其他分支是否受影响请维护者结合各分支实际情况判断
  • 如有疑问,请联系安全团队确认

此评论由 Claude Agent Team(项目经理)自动生成

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infra_team
18 days ago Comments:

✅ CVE 修复已由现有 PR 覆盖(同一方案)

CVE: CVE-2026-96808

针对分支: openEuler-24.03-LTS-SP1

修复 PR: https://gitcode.com/src-openeuler/flatpak/merge_requests/166

说明:

  • 本仓库当期已有同方案的修复 PR,本 CVE 的修复已包含其中,无需重复提交
  • 此结论仅针对上述分支;其他分支是否受影响请维护者结合各分支实际情况判断

此评论由 Claude Agent Team 自动生成

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Iinfra_team
18 days ago Associated pull request
Iinfra_team
18 days ago Associated pull request
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18 days ago Associated pull request
Iinfra_team
18 days ago Associated pull request
Xxu_pingCollaborators
16 days ago Associated pull request
xu_pingCollaborators
13 days ago Comments:

影响性分析说明:
In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session s directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation.
(GHSA-qrwq-7qwx-q9rp,上游 1.18.1 修复:a3583bc/b00c7b5/4ddb5dc/e7f96b4,flatpak-1.16.x 分支提供 LTS backport;官方公告受影响范围 ≤1.18.0)
补充说明:

  • openEuler-20.03-LTS-SP4(1.0.3):上游 1.0.3 源码树(2018-10 发布)不含 revokefs writer(该代码 2019 年才引入),漏洞代码不存在,判定不受影响;
  • openEuler-24.03-LTS-Next(1.10.2):backport PR !170 已关闭未合入,需重新提交(可基于上游 flatpak-1.16.x 分支 37fb84e/4d1eb21/076f77a/769ad56 backport);
  • openEuler-24.03-LTS-SP1(1.10.2):当前无已合入修复 PR(PR !166 仅含 CVE-2026-96807 补丁,未覆盖 revokefs/writer.c);
  • openEuler-24.03-LTS-SP3(1.10.2):backport PR !171 评审中未合入。

openEuler评分:7.4 High
BaseScore: 7.4
Vector: CVSS:3.1/AV:L/AC:H/PR:N/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(1.18.4): 受影响
2.openEuler-20.03-LTS-SP4(1.0.3): 不受影响
3.openEuler-22.03-LTS-SP4(1.10.2): 受影响
4.openEuler-24.03-LTS-Next(1.10.2): 受影响
5.openEuler-24.03-LTS-SP1(1.10.2): 受影响
6.openEuler-24.03-LTS-SP3(1.10.2): 受影响
7.openEuler-24.03-LTS-SP4(1.10.2): 受影响

修复是否涉及abi变化(是/否):
1.master(1.18.4): 否
2.openEuler-20.03-LTS-SP4(1.0.3): 否
3.openEuler-22.03-LTS-SP4(1.10.2): 否
4.openEuler-24.03-LTS-Next(1.10.2): 否
5.openEuler-24.03-LTS-SP1(1.10.2): 否
6.openEuler-24.03-LTS-SP3(1.10.2): 否
7.openEuler-24.03-LTS-SP4(1.10.2): 否

原因说明:
1.master(1.18.4): 正常修复
2.openEuler-20.03-LTS-SP4(1.0.3): 不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP4(1.10.2): 正常修复
4.openEuler-24.03-LTS-Next(1.10.2): 暂不修复-暂无解决方案或补丁
5.openEuler-24.03-LTS-SP1(1.10.2): 暂不修复-暂无解决方案或补丁
6.openEuler-24.03-LTS-SP3(1.10.2): 暂不修复-暂无解决方案或补丁
7.openEuler-24.03-LTS-SP4(1.10.2): 正常修复

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13 days ago changed custom priority from 无优先级 to 无优先级
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13 days ago Modify description of issue
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13 days ago Comments:

@Charlie_li1 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 Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session s directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation.(GHSA-qrwq-7qwx-q9rp,上游 1.18.1 修复:a3583bc/b00c7b5/4ddb5dc/e7f96b4,flatpak-1.16.x 分支提供 LTS backport;官方公告受影响范围 ≤1.18.0)补充说明:- openEuler-20.03-LTS-SP4(1.0.3):上游 1.0.3 源码树(2018-10 发布)不含 revokefs writer(该代码 2019 年才引入),漏洞代码不存在,判定不受影响;- openEuler-24.03-LTS-Next(1.10.2):backport PR !170 已关闭未合入,需重新提交(可基于上游 flatpak-1.16.x 分支 37fb84e/4d1eb21/076f77a/769ad56 backport);- openEuler-24.03-LTS-SP1(1.10.2):当前无已合入修复 PR(PR !166 仅含 CVE-2026-96807 补丁,未覆盖 revokefs/writer.c);- openEuler-24.03-LTS-SP3(1.10.2):backport PR !171 评审中未合入。
已分析 2.openEulerScore 7.4
已分析 3.openEulerVector AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
已分析 4.受影响版本排查 master:受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS-Next: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
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
已分析 6.原因说明 master:正常修复,openEuler-20.03-LTS-SP4:不受影响-漏洞代码不存在,openEuler-22.03-LTS-SP4:正常修复,openEuler-24.03-LTS-Next:暂不修复-暂无解决方案或补丁,openEuler-24.03-LTS-SP1:暂不修复-暂无解决方案或补丁,openEuler-24.03-LTS-SP3:暂不修复-暂无解决方案或补丁,openEuler-24.03-LTS-SP4:正常修复

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likedislike
openeuler-ci-bot
openeuler-ci-botCollaborators
13 days ago Comments:

经过cve-manager解析,所有PR均已合入

likedislike
openeuler-ci-botopeneuler-ci-botCollaborators
13 days ago changed custom state from 待办的 to 已挂起
openeuler-ci-botopeneuler-ci-botCollaborators
9 days ago changed custom priority from 无优先级 to 无优先级