CVE-2026-23322
HighSummary
W jądrze systemu Linux zidentyfikowano podatność związana z błędnym zarządzaniem pamięcią w module IPMI. Problem występuje, gdy wysyłający zgłasza błąd, co prowadzi do uszkodzenia listy i potencjalnego użycia zwolnionej pamięci.
Risk Assessment
Podatność ta może prowadzić do poważnych problemów z stabilnością systemu, w tym do awarii lub nieprzewidzianego zachowania aplikacji korzystających z jądra. Może to również stwarzać ryzyko dla bezpieczeństwa, umożliwiając atakującym wykonanie nieautoryzowanego kodu.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, w której ta podatność została naprawiona. Należy również monitorować systemy pod kątem nietypowych zachowań, które mogą wskazywać na wykorzystanie tej luki.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ipmi: Fix use-after-free and list corruption on sender error The analysis from Breno: When the SMI sender returns an error, smi_work() delivers an error response but then jumps back to restart without cleaning up properly: 1. intf->curr_msg is not cleared, so no new message is pulled 2. newmsg still points to the message, causing sender() to be called again with the same message 3. If sender() fails again, deliver_err_response() is called with the same recv_msg that was already queued for delivery This causes list_add corruption ("list_add double add") because the recv_msg is added to the user_msgs list twice. Subsequently, the corrupted list leads to use-after-free when the memory is freed and reused, and eventually a NULL pointer dereference when accessing recv_msg->done. The buggy sequence: sender() fails -> deliver_err_response(recv_msg) // recv_msg queued for delivery -> goto restart
Vulnerability data from NVD (NIST) · CISA KEV · EPSS