CVE-2026-31642
MediumCVSS 5.5Summary
W jądrze systemu Linux naprawiono podatność związaną z usuwaniem wywołań rxrpc z listy rxnet->calls. Zmiana polega na użyciu list_del_rcu() zamiast list_del_init(), co zapobiega potencjalnemu wpadnięciu w nieskończoną pętlę podczas odczytu /proc/net/rxrpc/calls.
Risk Assessment
Brak odpowiedniego wykrywania usuniętych wpisów z listy może prowadzić do trudności w monitorowaniu stanu wywołań, co zwiększa ryzyko błędów w działaniu aplikacji korzystających z tej funkcjonalności.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, aby skorzystać z poprawek dotyczących usuwania wywołań rxrpc oraz monitorowanie aplikacji korzystających z tej funkcji.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call removal to use RCU safe deletion Fix rxrpc call removal from the rxnet->calls list to use list_del_rcu() rather than list_del_init() to prevent stuffing up reading /proc/net/rxrpc/calls from potentially getting into an infinite loop. This, however, means that list_empty() no longer works on an entry that's been deleted from the list, making it harder to detect prior deletion. Fix this by: Firstly, make rxrpc_destroy_all_calls() only dump the first ten calls that are unexpectedly still on the list. Limiting the number of steps means there's no need to call cond_resched() or to remove calls from the list here, thereby eliminating the need for rxrpc_put_call() to check for that. rxrpc_put_call() can then be fixed to unconditionally delete the call from the list as it is the only place that the deletion occurs.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS