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.
Affected versions
Linux kernel versions
3.18.139,
4.4.179,
4.9.170,
4.14.113,
4.19.36,
4.20
and later are affected. Fixed in
5.10.258,
5.15.209,
6.1.175,
6.6.140,
6.12.88,
6.18.30,
7.0.7,
7.1-rc3
and their respective stable series.
References
The following references provide additional information about CVE-2026-46187 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/16d9f674c619838bdeae42abc0929c9c5477ea1f
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PatchKernel patch commithttps://git.kernel.org/stable/c/4ac3095da22fc50e51ec10c3b8323c21ab3e441a
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PatchKernel patch commithttps://git.kernel.org/stable/c/4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f
Frequently asked questions
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What is CVE-2026-46187?
CVE-2026-46187 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.18.139 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-46187 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46187?
Yes — CVE-2026-46187 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 3.18.139 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46187 actively exploited?
No — CVE-2026-46187 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.