CVE-2026-43074
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
W jądrze Linuxa zidentyfikowano podatność, która została rozwiązana. W pewnych sytuacjach funkcja ep_free() w pliku eventpoll.c zwalnia strukturę eventpoll, podczas gdy jest ona nadal używana przez inny wątek współbieżny. Zastosowano opóźnienie zwolnienia pamięci do wywołania zwrotnego RCU, aby zapobiec użyciu po zwolnieniu (UAF).
Risk Assessment
Podatność ta może prowadzić do nieprzewidywalnych zachowań systemu, w tym do awarii aplikacji lub naruszenia integralności danych. W przypadku wykorzystania tej luki przez atakującego, może to skutkować poważnymi konsekwencjami dla stabilności systemu.
Recommendation
Zaleca się aktualizację jądra Linux do najnowszej wersji, w której ta podatność została naprawiona. Regularne monitorowanie i stosowanie poprawek bezpieczeństwa jest kluczowe dla ochrony systemu.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

