CVE-2026-99058
In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix NULL current_pwq deref in chained work check current_wq_worker() only tells us that %current is a kworker. It does not guarantee that the worker is currently executing a work item, as worker->current_pwq is populated only while process_one_work() is running the work function. is_chained_work() can be reached while queueing on a draining or destroying workqueue. If a kworker outside work-item execution reaches that path, current_wq_worker() returns a worker but worker->current_pwq is NULL, and the chained-work test can fault before it emits the intended warning. Guard the chained-work test with worker->current_pwq. A kworker without current_pwq is not executing work on the target workqueue, so the helper should return false and let the draining/destroying warning fire.
Affected versions
Linux kernel versions
3.9
and later are affected. Fixed in
6.6.160,
6.12.113,
6.18.57,
7.2.11,
7.3
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-99058?
CVE-2026-99058 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.9 onward and has been patched in 6.6.160, 6.12.113, 6.18.57 and others. CVE-2026-99058 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-2026-99058?
Yes. CVE-2026-99058 has been patched. Fixed versions include 6.6.160, 6.12.113, 6.18.57 and others. If you are running Linux kernel 3.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-99058 actively exploited?
No. CVE-2026-99058 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.