SB20260424195 - Use-after-free in Linux kernel xfrm
Published: April 24, 2026
Security Bulletin ID
SB20260424195
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) Use-after-free (CVE-ID: CVE-2026-31516)
CWE-ID: CWE-416 - Use After Free
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 a use-after-free in xfrm_hash_rebuild() when processing an XFRM_MSG_NEWSPDINFO request that queues policy_hthresh.work during net namespace teardown. A local user can send a specially crafted XFRM_MSG_NEWSPDINFO request to cause a denial of service.
Remediation
Install update from vendor's website.