SB2025120484 - Improper locking in Linux kernel xfrm
Published: December 4, 2025
Security Bulletin ID
SB2025120484
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-2025-40215)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the __xfrm_state_destroy(), __xfrm_state_delete(), xfrm_state_flush(), xfrm_flush_gc() and xfrm_state_fini() functions in net/xfrm/xfrm_state.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.