CVE-2025-21722— Linux kernel 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于nilfs2强制清除被引用的缓冲区。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8c26c4e2694a163d525976e804d81cd955bbb40c< 7d0544bacc11d6aa26ecd7debf9353193c7a3328 |
affected |
8c26c4e2694a163d525976e804d81cd955bbb40c< 4d042811c72f71be7c14726db2c72b67025a7cb5 |
affected | ||
8c26c4e2694a163d525976e804d81cd955bbb40c< f51ff43c4c5a6c8e72d0aca89e4d5e688938412f |
affected | ||
8c26c4e2694a163d525976e804d81cd955bbb40c< 19296737024cd220a1d6590bf4c092bca8c99497 |
affected | ||
8c26c4e2694a163d525976e804d81cd955bbb40c< 8458c686d50a804611b97038dd6e75a474ac2221 |
affected | ||
8c26c4e2694a163d525976e804d81cd955bbb40c< 1098bb8d52419d262a3358d099a1598a920b730f |
affected | ||
8c26c4e2694a163d525976e804d81cd955bbb40c< 557ccf5e49f1fb848a29698585bcab2e50a597ef |
affected | ||
8c26c4e2694a163d525976e804d81cd955bbb40c< ca76bb226bf47ff04c782cacbd299f12ddee1ec1 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-21722 基础信息
漏洞信息
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Vulnerability Title
nilfs2: do not force clear folio if buffer is referenced
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: do not force clear folio if buffer is referenced
Patch series "nilfs2: protect busy buffer heads from being force-cleared".
This series fixes the buffer head state inconsistency issues reported by
syzbot that occurs when the filesystem is corrupted and falls back to
read-only, and the associated buffer head use-after-free issue.
This patch (of 2):
Syzbot has reported that after nilfs2 detects filesystem corruption and
falls back to read-only, inconsistencies in the buffer state may occur.
One of the inconsistencies is that when nilfs2 calls mark_buffer_dirty()
to set a data or metadata buffer as dirty, but it detects that the buffer
is not in the uptodate state:
WARNING: CPU: 0 PID: 6049 at fs/buffer.c:1177 mark_buffer_dirty+0x2e5/0x520
fs/buffer.c:1177
...
Call Trace:
<TASK>
nilfs_palloc_commit_alloc_entry+0x4b/0x160 fs/nilfs2/alloc.c:598
nilfs_ifile_create_inode+0x1dd/0x3a0 fs/nilfs2/ifile.c:73
nilfs_new_inode+0x254/0x830 fs/nilfs2/inode.c:344
nilfs_mkdir+0x10d/0x340 fs/nilfs2/namei.c:218
vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4257
do_mkdirat+0x264/0x3a0 fs/namei.c:4280
__do_sys_mkdirat fs/namei.c:4295 [inline]
__se_sys_mkdirat fs/namei.c:4293 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The other is when nilfs_btree_propagate(), which propagates the dirty
state to the ancestor nodes of a b-tree that point to a dirty buffer,
detects that the origin buffer is not dirty, even though it should be:
WARNING: CPU: 0 PID: 5245 at fs/nilfs2/btree.c:2089
nilfs_btree_propagate+0xc79/0xdf0 fs/nilfs2/btree.c:2089
...
Call Trace:
<TASK>
nilfs_bmap_propagate+0x75/0x120 fs/nilfs2/bmap.c:345
nilfs_collect_file_data+0x4d/0xd0 fs/nilfs2/segment.c:587
nilfs_segctor_apply_buffers+0x184/0x340 fs/nilfs2/segment.c:1006
nilfs_segctor_scan_file+0x28c/0xa50 fs/nilfs2/segment.c:1045
nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1216 [inline]
nilfs_segctor_collect fs/nilfs2/segment.c:1540 [inline]
nilfs_segctor_do_construct+0x1c28/0x6b90 fs/nilfs2/segment.c:2115
nilfs_segctor_construct+0x181/0x6b0 fs/nilfs2/segment.c:2479
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2587 [inline]
nilfs_segctor_thread+0x69e/0xe80 fs/nilfs2/segment.c:2701
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Both of these issues are caused by the callbacks that handle the
page/folio write requests, forcibly clear various states, including the
working state of the buffers they hold, at unexpected times when they
detect read-only fallback.
Fix these issues by checking if the buffer is referenced before clearing
the page/folio state, and skipping the clear if it is.
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 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于nilfs2强制清除被引用的缓冲区。
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-2025-21722 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-21722 补丁与修复 (5)
CVE-2025-21722 其他参考 (3)
同批安全公告 · Linux · 2025-02-27 · 共 177 条
| CVE-2025-21805 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21707 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21748 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21796 | 9.8 CRITICAL | Linux kernel 资源管理错误漏洞 |
| CVE-2024-58006 | 9.6 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-57997 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57995 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57999 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21735 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21710 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57973 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21760 | 8.1 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21762 | 8.1 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21766 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21765 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21718 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21730 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21729 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21753 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21717 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 177 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21722
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