SB20260626134 - Deadlock in Linux kernel xfrm
Published: June 26, 2026
Security Bulletin ID
SB20260626134
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) Deadlock (CVE-ID: CVE-2026-53197)
CWE-ID: CWE-833 - Deadlock
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 cause a denial of service.
The vulnerability exists due to an improper lock handling race condition in iptfs_destroy_state() in the xfrm iptfs subsystem when canceling active high-resolution timers during state destruction. A local user can trigger timer activity and state destruction to cause a denial of service.
The issue can lead to an ABBA deadlock on SMP systems.
Remediation
Install update from vendor's website.