Improper locking in Linux kernel - CVE-2026-23420
Published: April 6, 2026
Vulnerability identifier: #VU124951
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-2026-23420
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 a denial of service.
The vulnerability exists due to improper locking in wlcore when handling wireless operations. A local user can trigger the affected code path to cause a denial of service.
The issue is caused by unlocking wl->mutex without ensuring that it is locked first.
How to mitigate CVE-2026-23420
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1a1c28a08d74716f3f8e3a21c86b30d0ff13521a
- https://git.kernel.org/stable/c/5feeea59ed142e15c3284d0b1a364c6786bf3487
- https://git.kernel.org/stable/c/72c6df8f284b3a49812ce2ac136727ace70acc7c
- https://git.kernel.org/stable/c/7ab511003c5ae3bf5364d7699a2e3ab1db513680
- https://git.kernel.org/stable/c/aca4c9e4901b01b8b985993dc7df80bd1d1338bd
- https://git.kernel.org/stable/c/fcef983ad88832f3aa83491a174c345de57afbbd