CVE-2026-43066
MediumSummary
W jądrze Linuxa naprawiono podatność związaną z wyciekiem iloc.bh w funkcji ext4_fc_replay_inode() w ścieżkach błędów. Problem polegał na tym, że kilka ścieżek błędów nie zwalniało iloc.bh, co mogło prowadzić do wycieków pamięci.
Risk Assessment
Niewłaściwe zarządzanie pamięcią może prowadzić do wycieków, co w dłuższej perspektywie może wpłynąć na stabilność systemu oraz bezpieczeństwo danych. Organizacje powinny być świadome potencjalnych problemów z wydajnością i stabilnością systemu.
Recommendation
Zaleca się aktualizację jądra Linux do najnowszej wersji, aby usunąć tę podatność. Dodatkowo, monitorowanie systemu pod kątem nieprawidłowego zarządzania pamięcią może pomóc w identyfikacji podobnych problemów w przyszłości.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths During code review, Joseph found that ext4_fc_replay_inode() calls ext4_get_fc_inode_loc() to get the inode location, which holds a reference to iloc.bh that must be released via brelse(). However, several error paths jump to the 'out' label without releasing iloc.bh: - ext4_handle_dirty_metadata() failure - sync_dirty_buffer() failure - ext4_mark_inode_used() failure - ext4_iget() failure Fix this by introducing an 'out_brelse' label placed just before the existing 'out' label to ensure iloc.bh is always released. Additionally, make ext4_fc_replay_inode() propagate errors properly instead of always returning 0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

