Use-after-free in Linux kernel - CVE-2026-46187
Published: May 29, 2026
Vulnerability identifier: #VU133003
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-2026-46187
CWE-ID: CWE-416
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 use-after-free in the rsi wifi driver kthread handling logic when stopping a kernel thread after it has already self-exited. A local user can trigger the race condition to cause a denial of service.
The issue occurs in the rare case where self-exit via kthread_complete_and_exit() happens before an external stop via kthread_stop().
How to mitigate CVE-2026-46187
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/16d9f674c619838bdeae42abc0929c9c5477ea1f
- https://git.kernel.org/stable/c/4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f
- https://git.kernel.org/stable/c/4f9a4ae8d2c198f01611ea376034c326ef43ab56
- https://git.kernel.org/stable/c/95fcb436586dc3c2983537d557ac05bbc6a027f3
- https://git.kernel.org/stable/c/db57a1aa54ff68669781976e4edb045e09e2b65b