CVE-2026-89685
HighExploitation Probability (EPSS)
Low risk38th percentile - higher than 38% of all known CVEs
Summary
W jądrze Linux funkcja clients_still_reclaiming() oblicza termin na podstawie nn->boot_time (CLOCK_REALTIME) i porównuje go z ktime_get_boottime_seconds() (CLOCK_BOOTTIME), przez co porównanie jest zawsze fałszywe. W efekcie dowolny klient może utrzymywać serwer w stanie grace w nieskończoność, wysyłając żądania CLAIM_PREVIOUS OPEN, blokując wszystkie operacje nie-reclaim dla pozostałych klientów.
Risk Assessment
Złośliwy lub błędnie działający klient NFS może zablokować obsługę wszystkich innych klientów NFS poprzez trwałe utrzymywanie serwera w fazie grace. Prowadzi to do odmowy usługi (DoS) dla całego eksportu NFS.
Recommendation
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Vulnerability data from NVD (NIST) · CISA KEV · EPSS

