CVE-2026-31516
kernel: xfrm: prevent policy_hthresh.work from racing with netns teardown
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 22, 2026
Updated · July 3, 2026
Description
A flaw was found in the Linux kernel's XFRM (IP eXtensible FRamework) subsystem. A race condition can occur during the teardown of a network namespace, where a work item attempts to access memory that has already been freed. This can lead to a use-after-free vulnerability, potentially causing system instability or denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.4CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-364 · Signal Handler Race Condition