CVE-2026-93829
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix races in cifsd thread creation The cifsd demultiplex thread can run and access tcp_ses before the parent thread has finished populating tcp_ses, which the worker thread accesses locklessly. Also, the kthread_run macro may start the thread before returning the thread pointer. Because the pointer is part of the structure that the thread can access, if the kernel is preempted after the thread is spawned, but before the thread pointer is populated and the thread attempts to exit, it will sleep, waiting for a SIGKILL signal. Fix this by moving creation of the thread to after all of tcp_ses'es fields are populated, and spawning the thread last, using a split kthread_create/wake_up_process logic.
Affected versions
Linux kernel versions
2.6.22
and later are affected. Fixed in
6.6.158,
6.12.111,
6.18.53,
7.2
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-93829?
CVE-2026-93829 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.22 onward and has been patched in 6.6.158, 6.12.111, 6.18.53 and others. CVE-2026-93829 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-2026-93829?
Yes. CVE-2026-93829 has been patched. Fixed versions include 6.6.158, 6.12.111, 6.18.53 and others. If you are running Linux kernel 2.6.22 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-93829 actively exploited?
No. CVE-2026-93829 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.