CVE-2026-23014
HighSummary
W jądrze Linuxa rozwiązano podatność związaną z niewłaściwym usuwaniem hrtimera w kontekście zdarzeń perf. Zmiana w funkcji hrtimer_try_to_cancel() w perf_swevent_cancel_hrtimer() mogła prowadzić do sytuacji, w której hrtimer pozostaje aktywny podczas zwalniania zdarzenia.
Risk Assessment
Niewłaściwe zarządzanie hrtimerem może prowadzić do wycieków pamięci lub nieprzewidzianych zachowań systemu, co stwarza ryzyko destabilizacji aplikacji korzystających z funkcji perf.
Recommendation
Zaleca się zainstalowanie handlera perf_event::destroy, aby zapewnić pełne anulowanie hrtimera w trakcie zwalniania zdarzenia.
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Original NVD description (English source)
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.

