CVE-2025-40306— 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xattr_key函数存在缓冲区溢出，可能导致内存损坏。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | f7ab093f74bf638ed98fd1115f3efa17e308bb7f< c6564ff6b53c9a8dc786b6f1c51ae7688273f931 |
affected |
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< ef892d2bf4f3fa2c8de1677dd307e678bdd3d865 |
affected | ||
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< 15afebb9597449c444801d1ff0b8d8b311f950ab |
affected | ||
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< bc812574de633cf9a9ad6974490e45f6a4bb5126 |
affected | ||
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< e09a096104fc65859422817fb2211f35855983fe |
affected | ||
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< 9127d1e90c90e5960c8bc72a4ce2c209691a7021 |
affected | ||
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< c2ca015ac109fd743fdde27933d59dc5ad46658e |
affected | ||
f7ab093f74bf638ed98fd1115f3efa17e308bb7f< 025e880759c279ec64d0f754fe65bf45961da864 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-40306 基础信息
漏洞信息
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Vulnerability Title
orangefs: fix xattr related buffer overflow...
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
orangefs: fix xattr related buffer overflow...
Willy Tarreau <w@1wt.eu> forwarded me a message from
Disclosure <disclosure@aisle.com> with the following
warning:
> The helper `xattr_key()` uses the pointer variable in the loop condition
> rather than dereferencing it. As `key` is incremented, it remains non-NULL
> (until it runs into unmapped memory), so the loop does not terminate on
> valid C strings and will walk memory indefinitely, consuming CPU or hanging
> the thread.
I easily reproduced this with setfattr and getfattr, causing a kernel
oops, hung user processes and corrupted orangefs files. Disclosure
sent along a diff (not a patch) with a suggested fix, which I based
this patch on.
After xattr_key started working right, xfstest generic/069 exposed an
xattr related memory leak that lead to OOM. xattr_key returns
a hashed key. When adding xattrs to the orangefs xattr cache, orangefs
used hash_add, a kernel hashing macro. hash_add also hashes the key using
hash_log which resulted in additions to the xattr cache going to the wrong
hash bucket. generic/069 tortures a single file and orangefs does a
getattr for the xattr "security.capability" every time. Orangefs
negative caches on xattrs which includes a kmalloc. Since adds to the
xattr cache were going to the wrong bucket, every getattr for
"security.capability" resulted in another kmalloc, none of which were
ever freed.
I changed the two uses of hash_add to hlist_add_head instead
and the memory leak ceased and generic/069 quit throwing furniture.
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xattr_key函数存在缓冲区溢出，可能导致内存损坏。
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-2025-40306 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-2025-40302 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40291 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40303 | 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-2025-40306
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