CVE-2025-40096— 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drm_sched_job_add_resv_dependencies函数中可能发生双重释放。
可能的 ATT&CK 技术 1 AI
T1211 · Exploitation for Stealth影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 963d0b3569354230f6e2c36a286ef270a8901878< 4c38a63ae12ecc9370a7678077bde2d61aa80e9c |
affected |
963d0b3569354230f6e2c36a286ef270a8901878< 57239762aa90ad768dac055021f27705dae73344 |
affected | ||
963d0b3569354230f6e2c36a286ef270a8901878< e5e3eb2aff92994ee81ce633f1c4e73bd4b87e11 |
affected | ||
963d0b3569354230f6e2c36a286ef270a8901878< fdfb47e85af1e11ec822c82739dde2dd8dff5115 |
affected | ||
963d0b3569354230f6e2c36a286ef270a8901878< 5801e65206b065b0b2af032f7f1eef222aa2fd83 |
affected | ||
5.16 |
affected | ||
< 5.16 |
unaffected | ||
6.1.158≤ 6.1.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2025-40096 基础信息
漏洞信息
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Vulnerability Title
drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies
When adding dependencies with drm_sched_job_add_dependency(), that
function consumes the fence reference both on success and failure, so in
the latter case the dma_fence_put() on the error path (xarray failed to
expand) is a double free.
Interestingly this bug appears to have been present ever since
commit ebd5f74255b9 ("drm/sched: Add dependency tracking"), since the code
back then looked like this:
drm_sched_job_add_implicit_dependencies():
...
for (i = 0; i < fence_count; i++) {
ret = drm_sched_job_add_dependency(job, fences[i]);
if (ret)
break;
}
for (; i < fence_count; i++)
dma_fence_put(fences[i]);
Which means for the failing 'i' the dma_fence_put was already a double
free. Possibly there were no users at that time, or the test cases were
insufficient to hit it.
The bug was then only noticed and fixed after
commit 9c2ba265352a ("drm/scheduler: use new iterator in drm_sched_job_add_implicit_dependencies v2")
landed, with its fixup of
commit 4eaf02d6076c ("drm/scheduler: fix drm_sched_job_add_implicit_dependencies").
At that point it was a slightly different flavour of a double free, which
commit 963d0b356935 ("drm/scheduler: fix drm_sched_job_add_implicit_dependencies harder")
noticed and attempted to fix.
But it only moved the double free from happening inside the
drm_sched_job_add_dependency(), when releasing the reference not yet
obtained, to the caller, when releasing the reference already released by
the former in the failure case.
As such it is not easy to identify the right target for the fixes tag so
lets keep it simple and just continue the chain.
While fixing we also improve the comment and explain the reason for taking
the reference and not dropping it.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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drm_sched_job_add_resv_dependencies函数中可能发生双重释放。
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-2025-40096 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-40096 补丁与修复 (1)
同批安全公告 · Linux · 2025-10-30 · 共 20 条
| CVE-2025-40099 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40095 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40105 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40104 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40094 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40093 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40092 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40090 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40087 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40088 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40091 | Linux kernel 安全漏洞 | |
| CVE-2025-40086 | Linux kernel 安全漏洞 | |
| CVE-2025-40097 | Linux kernel 安全漏洞 | |
| CVE-2025-40098 | Linux kernel 安全漏洞 | |
| CVE-2025-40089 | Linux kernel 安全漏洞 | |
| CVE-2025-40101 | Linux kernel 安全漏洞 | |
| CVE-2025-40100 | Linux kernel 安全漏洞 | |
| CVE-2025-40102 | Linux kernel 安全漏洞 | |
| CVE-2025-40103 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-40096
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