CVE-2025-40303— 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，该漏洞源于错误处理不当，可能导致元数据写入错误状态的文件系统。
影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 13e6c37b989859e70b0d73d3f2cb0aa022159b17< 066ee13f05fbd82ada01883e51f0695172f98dff |
affected |
13e6c37b989859e70b0d73d3f2cb0aa022159b17< e2b3859067bf012d53c49b3f885fef40624a2c83 |
affected | ||
13e6c37b989859e70b0d73d3f2cb0aa022159b17< 54a5b5a15588e3b0b294df31474d08a2678d4291 |
affected | ||
13e6c37b989859e70b0d73d3f2cb0aa022159b17< 2618849f31e7cf51fadd4a5242458501a6d5b315 |
affected | ||
3.10 |
affected | ||
< 3.10 |
unaffected | ||
6.6.117≤ 6.6.* |
unaffected | ||
6.12.58≤ 6.12.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2025-40303 基础信息
漏洞信息
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Vulnerability Title
btrfs: ensure no dirty metadata is written back for an fs with errors
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
btrfs: ensure no dirty metadata is written back for an fs with errors
[BUG]
During development of a minor feature (make sure all btrfs_bio::end_io()
is called in task context), I noticed a crash in generic/388, where
metadata writes triggered new works after btrfs_stop_all_workers().
It turns out that it can even happen without any code modification, just
using RAID5 for metadata and the same workload from generic/388 is going
to trigger the use-after-free.
[CAUSE]
If btrfs hits an error, the fs is marked as error, no new
transaction is allowed thus metadata is in a frozen state.
But there are some metadata modifications before that error, and they are
still in the btree inode page cache.
Since there will be no real transaction commit, all those dirty folios
are just kept as is in the page cache, and they can not be invalidated
by invalidate_inode_pages2() call inside close_ctree(), because they are
dirty.
And finally after btrfs_stop_all_workers(), we call iput() on btree
inode, which triggers writeback of those dirty metadata.
And if the fs is using RAID56 metadata, this will trigger RMW and queue
new works into rmw_workers, which is already stopped, causing warning
from queue_work() and use-after-free.
[FIX]
Add a special handling for write_one_eb(), that if the fs is already in
an error state, immediately mark the bbio as failure, instead of really
submitting them.
Then during close_ctree(), iput() will just discard all those dirty
tree blocks without really writing them back, thus no more new jobs for
already stopped-and-freed workqueues.
The extra discard in write_one_eb() also acts as an extra safenet.
E.g. the transaction abort is triggered by some extent/free space
tree corruptions, and since extent/free space tree is already corrupted
some tree blocks may be allocated where they shouldn't be (overwriting
existing tree blocks). In that case writing them back will further
corrupting the fs.
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，该漏洞源于错误处理不当，可能导致元数据写入错误状态的文件系统。
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-2025-40303 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-12-08 · 共 82 条
| CVE-2023-53751 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40320 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53769 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53764 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53762 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40318 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40292 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40309 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40304 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40291 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40290 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53759 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40317 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40319 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40323 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53753 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53752 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53747 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50623 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50630 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 82 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-40303
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