CVE-2026-46187

Description

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.

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EPSS — Exploit Prediction

0.0009

Probability of exploitation

0.01%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/16d9f674c619838bdeae42abc0929c9c5477ea1f https://git.kernel.org/stable/c/4ac3095da22fc50e51ec10c3b8323c21ab3e441a https://git.kernel.org/stable/c/4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f https://git.kernel.org/stable/c/4f697813162d5f9151726a6d2bee82bffe4b0256 https://git.kernel.org/stable/c/4f9a4ae8d2c198f01611ea376034c326ef43ab56 https://git.kernel.org/stable/c/95fcb436586dc3c2983537d557ac05bbc6a027f3 https://git.kernel.org/stable/c/9dfe8a4458a063c6433526bc59112a169eee1aa3 https://git.kernel.org/stable/c/db57a1aa54ff68669781976e4edb045e09e2b65b

Frequently Asked Questions

What is CVE-2026-46187? +

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.

How do I check if I'm vulnerable to CVE-2026-46187? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.