SB20251112120 - Improper locking in Linux kernel block
Published: November 12, 2025
Security Bulletin ID
SB20251112120
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2025-40125)
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 website.
References
- 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