CVE-2026-46187: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: wifi: rsi: fix kthread lifetime race between self-exit and external-stop RSI driver use both self-exit(kthread_complete_and_exit) and external-stop (kthread_stop) when killing a kthread. Generally, kthread_stop() is called first, and in this case, no particular issues occur. However, in rare instances where kthread_complete_and_exit() is called first and then kthread_stop() is called, a UAF occurs because the kthread object, which has already exited and been freed, is accessed again. Therefore, to prevent this with minimal modification, you must remove kthread_stop() and change the code to wait until the self-exit operation is completed.

Affected products

• Linux Linux Kernel: from 3.18.139, before 3.19 (fixed in 3.19); from 4.4.179, before 4.5 (fixed in 4.5); from 4.9.170, before 4.10 (fixed in 4.10); from 4.14.113, before 4.15 (fixed in 4.15); from 4.19.36, before 5.10.258 (fixed in 5.10.258); from 5.11, before 5.15.209 (fixed in 5.15.209); …

Published 2026-05-28. Last modified 2026-06-17.