Improper access control in Linux kernel - CVE-2026-80929
Published: September 13, 2026
Vulnerability identifier: #VU149467
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80929
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to modify the global cad_pid kernel setting.
The vulnerability exists due to improper access control in the cad_pid sysctl when handling access from child pid and user namespaces. A local user can unshare pid and user namespaces and modify the cad_pid sysctl to modify the global cad_pid kernel setting.
Affected software
Linux kernel
How to mitigate CVE-2026-80929
Install security update from vendor's repository.