CVE-2025-40215— 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xfrm状态删除不完整，可能导致资源泄漏。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 9d4139c76905833afcb77fe8ccc17f302a0eb9ab< 1b28a7fae0128fa140a7dccd995182ff6cd1c67b |
affected |
9d4139c76905833afcb77fe8ccc17f302a0eb9ab< 4b2c17d0f9be8b58bb30468bc81a4b61c985b04e |
affected | ||
9d4139c76905833afcb77fe8ccc17f302a0eb9ab< 0da961fa46da1b37ef868d9b603bd202136f8f8e |
affected | ||
9d4139c76905833afcb77fe8ccc17f302a0eb9ab< d0e0d1097118461463b76562c7ebaabaa5b90b13 |
affected | ||
9d4139c76905833afcb77fe8ccc17f302a0eb9ab< dc3636912d41770466543623cb76e7b88fdb42c7 |
affected | ||
9d4139c76905833afcb77fe8ccc17f302a0eb9ab< b441cf3f8c4b8576639d20c8eb4aa32917602ecd |
affected | ||
2.6.29 |
affected | ||
< 2.6.29 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2025-40215 基础信息
漏洞信息
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Vulnerability Title
xfrm: delete x->tunnel as we delete x
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
xfrm: delete x->tunnel as we delete x
The ipcomp fallback tunnels currently get deleted (from the various
lists and hashtables) as the last user state that needed that fallback
is destroyed (not deleted). If a reference to that user state still
exists, the fallback state will remain on the hashtables/lists,
triggering the WARN in xfrm_state_fini. Because of those remaining
references, the fix in commit f75a2804da39 ("xfrm: destroy xfrm_state
synchronously on net exit path") is not complete.
We recently fixed one such situation in TCP due to defered freeing of
skbs (commit 9b6412e6979f ("tcp: drop secpath at the same time as we
currently drop dst")). This can also happen due to IP reassembly: skbs
with a secpath remain on the reassembly queue until netns
destruction. If we can't guarantee that the queues are flushed by the
time xfrm_state_fini runs, there may still be references to a (user)
xfrm_state, preventing the timely deletion of the corresponding
fallback state.
Instead of chasing each instance of skbs holding a secpath one by one,
this patch fixes the issue directly within xfrm, by deleting the
fallback state as soon as the last user state depending on it has been
deleted. Destruction will still happen when the final reference is
dropped.
A separate lockdep class for the fallback state is required since
we're going to lock x->tunnel while x is locked.
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xfrm状态删除不完整，可能导致资源泄漏。
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-2025-40215 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-40215 其他参考 (1)
同批安全公告 · Linux · 2025-12-04 · 共 53 条
| CVE-2025-40252 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40261 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40258 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40257 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40253 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40266 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40245 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40251 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40262 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40250 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40248 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40249 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40214 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40244 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40243 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40241 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40233 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40216 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40240 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40242 | 7.0 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 53 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-40215
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