CVE-2026-89749Medium· 5.5▾ SunlitA flaw was found in the Linux kernel. Specifically, within the tracing subsystem, the `event_test_stuff()` function can pass an invalid error pointer to `kthread_stop()` if `kthread_run()` fails to create a kernel thread. This improper han…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 4.4
none → medium
Last analysed / modified upstream
0.2% → 0.2%
— → 5.5
none → medium
A flaw was found in the Linux kernel. Specifically, within the tracing subsystem, the event_test_stuff() function can pass an invalid error pointer to kthread_stop() if kthread_run() fails to create a kernel thread. This improper handling of error pointers, particularly under memory pressure, leads to kthread_stop() attempting to dereference an invalid memory address. The consequence of this vulnerability is a kernel crash, resulting in a denial of service for the affected system.
kernel: tracing: Fix crash passing ERR_PTR to kthread_stop() — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-15.
Affected:
No fix planned:
Out of support scope
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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