#VU118418 Improper locking in Linux kernel - CVE-2025-40125
Published: November 12, 2025
Vulnerability identifier: #VU118418
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-40125
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the blk_mq_unregister_hctx() function in block/blk-mq-sysfs.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/06c4826b1d900611096e4621e93133db57e13911
- https://git.kernel.org/stable/c/4b97e99b87a773d52699521d40864f3ec888e9a6
- https://git.kernel.org/stable/c/4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed
- https://git.kernel.org/stable/c/6e7dadc5763c48eb3b9b91265a21f312599ebb2c
- https://git.kernel.org/stable/c/a8c53553f1833cc2d14175d2d72cf37193a01898
- https://git.kernel.org/stable/c/babc634e9fe2803962dba98a07587e835dbc0731
- https://git.kernel.org/stable/c/cc14ea21c4e658814d737ed4dedde6cd626a15ad
- https://git.kernel.org/stable/c/d5ddd76ee52bdc16e9f8b1e7791291e785dab032