检测到新建 CVE Issue，CVE-ID: CVE-2026-74378。
你可以通过以下两种方式使用 CVE 修复服务：
-
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；
- 在本 Issue 下评论：
-
在指定分支上创建 PR（修复提交）
- 在本 Issue 下按如下格式评论（
branch、name、email为必填字段，每个字段单独一行）：
- 在本 Issue 下按如下格式评论（
/create_pr
branch: OLK-6.6 OLK-5.10
name: dev
email: dev@devstation.com
backport-engine: opencode
- 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；backport-engine（可选）：可选portgpt、mystique或opencode；不填时默认使用portgpt，建议使用opencode；
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.
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已完成 CVE 修复全流程汇总，CVE-ID: CVE-2026-74378。
关联修复提交信息：RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe
| 目标分支 | 是否受影响 | 适配状态 | 是否存在冲突 | PR 链接 |
|---|---|---|---|---|
| OLK-5.10 | Affected | Need to adjust | Yes | - |
| openEuler-1.0-LTS | Affected | Need to adjust | Yes | - |
| OLK-6.6 | Fixed | - | No | branch: OLK-6.6, CVE: CVE-2026-74378 has fixed or not affected, create PR failed |
provided by DevStation.
已完成 CVE 修复全流程汇总，CVE-ID: CVE-2026-74378。
关联修复提交信息：RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe
| 目标分支 | 是否受影响 | 适配状态 | 是否存在冲突 | PR 链接 |
|---|---|---|---|---|
| OLK-5.10 | Affected | No action needed (patch already exists) | Yes | - |
| openEuler-1.0-LTS | Affected | No action needed (patch already exists) | Yes | - |
| OLK-6.6 | Fixed | - | No | branch: OLK-6.6, CVE: CVE-2026-74378 has fixed or not affected, create PR failed |
provided by DevStation.
一、漏洞信息
漏洞编号：CVE-2026-74378
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:RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqeget_srq_wqe() reads wqe->dma.num_sge from the shared receive queuebuffer, which is mapped into userspace. It validates num_sge againstmax_sge, but then re-reads the same field to calculate the memcpysize. A concurrent userspace thread can modify num_sge betweenvalidation and use, causing a heap buffer overflow when copying theWQE into qp->resp.srq_wqe.Read num_sge into a local variable and use it for both the boundscheck and the size calculation.
漏洞公开时间：2026-08-15 14:22:39
漏洞创建时间：2026-08-19 14:44:40
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2026-74378
更多参考(点击展开)
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)
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:RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqeget_srq_wqe() reads wqe->dma.num_sge from the shared receive queuebuffer, which is mapped into userspace. It validates num_sge againstmax_sge, but then re-reads the same field to calculate the memcpysize. A concurrent userspace thread can modify num_sge betweenvalidation and use, causing a heap buffer overflow when copying theWQE into qp->resp.srq_wqe.Read num_sge into a local variable and use it for both the boundscheck and the size calculation.The Linux kernel CVE team has assigned CVE-2026-74378 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):正常修复
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