CVE-2026-90111
HighExploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
W jądrze Linux w podsystemie routingu multicast IPv6 (ip6mr) pakiety przychodzące otrzymują dst bez licznika referencji (NOREF) pod RCU. Gdy pakiet multicast nie trafi w wyszukiwanie MFC, trafia do kolejki nierozwiązanych, opuszczając okres karencji RCU. Jeśli trasa zostanie usunięta i zwolniona, a kolejka MFC zostanie później rozwiązana z błędnym interfejsem nadrzędnym, ip6mr_cache_report() wykonuje dst_clone() na zwolnionym wpisie dst, powodując use-after-free.
Risk Assessment
Może prowadzić do użycia po zwolnieniu pamięci (slab use-after-free) i awarii jądra. Ryzyko dotyczy systemów z włączonym routingiem multicast IPv6.
Recommendation
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Vulnerability data from NVD (NIST) · CISA KEV · EPSS

