SB2025121696 - NULL pointer dereference in Linux kernel time
Published: December 16, 2025
Security Bulletin ID
SB2025121696
CSH 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 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2025-68214)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the __try_to_del_timer_sync() function in kernel/time/timer.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/176725f4848376530a0f0da9023f956afcc33585
- https://git.kernel.org/stable/c/1a975716cc8977f461e45e28e3e5977d46ad7a6a
- https://git.kernel.org/stable/c/20739af07383e6eb1ec59dcd70b72ebfa9ac362c
- https://git.kernel.org/stable/c/6665fbd7730b26d770c232b20d1b907e6a67a914
- https://git.kernel.org/stable/c/a01efa7a780c42ac5170a949bd95c9786ffcc60a