CVE-2025-37878— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确初始化子事件环境，可能导致空指针取消引用。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 7
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7ef5aa081f989ecfecc1df02068a80aebbd3ec31< 90dc6c1e3b200812da8d0aa030e1b7fda8226d0e |
affected |
1209b0b29fd472e7dbd2b06544b019dd9f9b7e51< cb56cd11feabf99e08bc18960700a53322ffcea7 |
affected | ||
c70ca298036c58a88686ff388d3d367e9d21acf0< 0ba3a4ab76fd3367b9cb680cad70182c896c795c |
affected | ||
315a50c6b1c6ce191f19f3372935d8e2ed9b53a6 |
affected | ||
6.13.12< 6.14 |
affected | ||
6.12.24< 6.12.26 |
affected | ||
6.14.3< 6.14.5 |
affected |
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一、 漏洞 CVE-2025-37878 基础信息
漏洞信息
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Vulnerability Title
perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init
Move the get_ctx(child_ctx) call and the child_event->ctx assignment to
occur immediately after the child event is allocated. Ensure that
child_event->ctx is non-NULL before any subsequent error path within
inherit_event calls free_event(), satisfying the assumptions of the
cleanup code.
Details:
There's no clear Fixes tag, because this bug is a side-effect of
multiple interacting commits over time (up to 15 years old), not
a single regression.
The code initially incremented refcount then assigned context
immediately after the child_event was created. Later, an early
validity check for child_event was added before the
refcount/assignment. Even later, a WARN_ON_ONCE() cleanup check was
added, assuming event->ctx is valid if the pmu_ctx is valid.
The problem is that the WARN_ON_ONCE() could trigger after the initial
check passed but before child_event->ctx was assigned, violating its
precondition. The solution is to assign child_event->ctx right after
its initial validation. This ensures the context exists for any
subsequent checks or cleanup routines, resolving the WARN_ON_ONCE().
To resolve it, defer the refcount update and child_event->ctx assignment
directly after child_event->pmu_ctx is set but before checking if the
parent event is orphaned. The cleanup routine depends on
event->pmu_ctx being non-NULL before it verifies event->ctx is
non-NULL. This also maintains the author's original intent of passing
in child_ctx to find_get_pmu_context before its refcount/assignment.
[ mingo: Expanded the changelog from another email by Gabriel Shahrouzi. ]
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确初始化子事件环境，可能导致空指针取消引用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2025-37878 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-37878 补丁与修复 (1)
同批安全公告 · Linux · 2025-05-09 · 共 52 条
| CVE-2025-37879 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37885 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37849 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37856 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37886 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37869 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37854 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37845 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37882 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37861 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37873 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37871 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37887 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37876 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37888 | Linux kernel 安全漏洞 | |
| CVE-2025-37877 | Linux kernel 安全漏洞 | |
| CVE-2025-37872 | Linux kernel 安全漏洞 | |
| CVE-2025-37870 | Linux kernel 安全漏洞 | |
| CVE-2025-37868 | Linux kernel 安全漏洞 | |
| CVE-2025-37867 | Linux kernel 安全漏洞 |
显示前 20 条，共 52 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-37878
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