Use-after-free in Linux kernel - CVE-2026-98163
Published: September 28, 2026
Vulnerability identifier: #VU152267
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98163
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a use-after-free condition.
The vulnerability exists due to improper task reference count validation in css_task_iter_next() when iterating dying tasks through cgroup.procs. A local user can read cgroup.procs while tasks exit to cause a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-98163
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3