CVE-2026-93829
CVE CVE-2026-93829EUVD EUVD-2026-86218Published 2026-09-24T16:03:11.000ZLast changed 2026-09-25T12:43:39.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 2.6.22; aaf737adb6937339494d5a7111f0433cd9676db8 <e8a5cf2ff5a13fefb228f2069e29dd7d8e37185d; patch: 6.12.111; aaf737adb6937339494d5a7111f0433cd9676db8 <0eee1e6cddd1d9ce14da06e0238ca8d3362dec90; patch: 6.18.53; patch: 7.2; aaf737adb6937339494d5a7111f0433cd9676db8 <ee8f811cbac56ffb738b3a73671a9e75b0f56e99; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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