Use-after-free in Linux kernel - CVE-2026-80928
Published: September 13, 2026
Vulnerability identifier: #VU149466
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80928
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 of struct cred.
The vulnerability exists due to a use-after-free in smack_file_send_sigiotask() when accessing the credentials of another task during signal delivery. A local user can trigger the affected credential access during a concurrent credential change to trigger a use-after-free of struct cred.
Affected software
Linux kernel
How to mitigate CVE-2026-80928
Install security update from vendor's repository.