Improper locking in Linux kernel - CVE-2026-31526
Published: April 24, 2026
Vulnerability identifier: #VU127624
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31526
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause various issues.
The vulnerability exists due to improper lock state validation in process_bpf_exit_full() when handling exception exits from static BPF subprograms. A local user can trigger bpf_throw() from a static subprogram to cause various issues.
The issue occurs because exception unwinding bypasses intermediate frame cleanup, which can leave user-acquired RCU, preempt, or IRQ-related locks unreleased.
How to mitigate CVE-2026-31526
Install security update from vendor's repository.