CVE-2026-31608
CriticalSummary
W jądrze Linuxa rozwiązano podatność związaną z podwójnym zwolnieniem pamięci w funkcji smb_direct_free_sendmsg po wywołaniu smb_direct_flush_send_list(). Problem polegał na tym, że smb_direct_flush_send_list() już wywołuje smb_direct_free_sendmsg(), co prowadziło do nieprawidłowego zarządzania pamięcią.
Risk Assessment
Podwójne zwolnienie pamięci może prowadzić do poważnych problemów z stabilnością systemu oraz potencjalnych luk bezpieczeństwa, które mogą być wykorzystane przez złośliwe oprogramowanie.
Recommendation
Zaleca się aktualizację jądra Linuxa do najnowszej wersji, aby usunąć tę podatność i zapewnić bezpieczeństwo systemu.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS