Bug 2433917 (CVE-2026-23014)

Summary: CVE-2026-23014 kernel: perf: Ensure swevent hrtimer is properly destroyed
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: grannygame.org
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OS: Linux   
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Description OSIDB Bzimport 2026-01-28 15:01:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

perf: Ensure swevent hrtimer is properly destroyed

With the change to hrtimer_try_to_cancel() in
perf_swevent_cancel_hrtimer() it appears possible for the hrtimer to
still be active by the time the event gets freed.

Make sure the event does a full hrtimer_cancel() on the free path by
installing a perf_event::destroy handler.
Comment 1 Jon Moroney 2026-01-28 17:04:44 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012847-CVE-2026-23014-85e6@gregkh/T
Comment 4 Octavia 2026-02-02 07:34:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012847-CVE-2026-23014-85e6@gregkh/T https://subwaysurferscity.org