SB20251210122 - Improper locking in Linux kernel time
Published: December 10, 2025 Updated: December 12, 2025
Security Bulletin ID
SB20251210122
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-2023-53815)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the SYSCALL_DEFINE1() and exit_itimers() functions in kernel/time/posix-timers.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/0670c4c567b27bd8f999a943028f4fe60d1a1106
- https://git.kernel.org/stable/c/9d9e522010eb5685d8b53e8a24320653d9d4cbbf
- https://git.kernel.org/stable/c/c1968bb8a28625cc95d2ad3ca872ab98c9c36d59
- https://git.kernel.org/stable/c/e7aff15ba29ba4b3052786b1636fa5c4aa39e179
- https://git.kernel.org/stable/c/f1be1ed32daa053484222f7f9beb2b16c624dffd
- https://git.kernel.org/stable/c/f9bd298e3e4d3fd6e19f017789a42d0f332cd555
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.13