Use-after-free in Linux kernel - CVE-2026-80955
Published: September 13, 2026
Vulnerability identifier: #VU149435
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80955
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free.
The vulnerability exists due to use-after-free in kset_replay() when processing a key whose segment generation is stale. A local user can cause kset_replay() to process such a key to trigger a use-after-free.
Expired invalid keys can also result in operations on segment data that is no longer valid.
Affected software
Linux kernel
How to mitigate CVE-2026-80955
Install security update from vendor's repository.