SB2025111326 - Improper locking in Linux kernel
Published: November 13, 2025
Security Bulletin ID
SB2025111326
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-2025-40201)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the SYSCALL_DEFINE4() function in kernel/sys.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/132f827e7bac7373e1522e89709d70b43cae5342
- https://git.kernel.org/stable/c/19b45c84bd9fd42fa97ff80c6350d604cb871c75
- https://git.kernel.org/stable/c/1bc0d9315ef5296abb2c9fd840336255850ded18
- https://git.kernel.org/stable/c/6796412decd2d8de8ec708213bbc958fab72f143
- https://git.kernel.org/stable/c/a15f37a40145c986cdf289a4b88390f35efdecc4