Improper locking in Linux kernel - CVE-2026-46262
Published: June 4, 2026
Vulnerability identifier: #VU133328
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-2026-46262
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 lock handling in fsl_xcvr_mode_put() in sound/soc/fsl/fsl_xcvr.c when handling ALSA control write operations. A local user can trigger the vulnerable control path to cause a denial of service.
The issue results from attempting to acquire a read lock on controls_rwsem while the same thread already holds the write lock, leading to a deadlock and a hung task.
How to mitigate CVE-2026-46262
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0886dc6326c3cc596799c4340d342898301cf52a
- https://git.kernel.org/stable/c/29b2fbe3498da3681a01b34e4a2259f8a1b89448
- https://git.kernel.org/stable/c/30ffcad5edb56947dccc26f6816ab7a55b21a711
- https://git.kernel.org/stable/c/9a2a5da002775376498e8814df4a87cd629a3a0c
- https://git.kernel.org/stable/c/9f16d96e1222391a6b996a1b676bec14fb91e3b2
- https://git.kernel.org/stable/c/ae5a70e3e87c28edbaf9939cfef1bcbd9615420f
- https://git.kernel.org/stable/c/b0f74f5d24fe3c73ef1369a811891198b54c1e8e