CVE-2026-23014
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-28

Last updated on: 2026-04-27

Assigner: kernel.org

Description
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.
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Meta Information
Published
2026-01-28
Last Modified
2026-04-27
Generated
2026-06-16
AI Q&A
2026-01-29
EPSS Evaluated
2026-06-14
NVD
CVE-2026-23014
EUVD
EUVD-2026-4926
Affected Vendors & Products
Showing 11 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.18
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 6.17.8 (inc) to 6.18 (exc)
linux linux_kernel From 6.18.1 (inc) to 6.18.6 (exc)
Helpful Resources
Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel relates to the perf subsystem's handling of high-resolution timers (hrtimers) in swevent. Specifically, after a change to the function hrtimer_try_to_cancel() within perf_swevent_cancel_hrtimer(), it became possible for the hrtimer to remain active even when the associated event is freed. The fix ensures that the event fully cancels the hrtimer during the free path by adding a perf_event::destroy handler to properly destroy the swevent hrtimer.

Impact Analysis

If the hrtimer is not properly destroyed when the event is freed, it could lead to use-after-free conditions or other timing-related issues in the kernel's perf subsystem. This might cause system instability, crashes, or potential security risks due to improper resource management.

Mitigation Strategies

Apply the patch or update to the Linux kernel version that includes the fix for this vulnerability, which ensures the swevent hrtimer is properly destroyed by installing a perf_event::destroy handler and performing a full hrtimer_cancel() on the free path.

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