CVE-2026-31642

Description

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.

Gravité et risque d'exploitation

CVE-2026-31642 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.17 %, ce qui la place devant 6.0 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <3be718f659683ad89fad6f1eb66bee99727cae64, <=6.1.*, <=6.12.*, 6.18.23, 0, <3e47a38e584b905359fe0ce5be5165d1e8592a90, 7.0, <146d4ab94cf129ee06cd467cb5c71368a6b5bad6, <280efb85e9759881a9d31d0874baa04583cb6c09, <ac5f54691be06a32246179d41be2d73598036deb, 5.15.209, <=5.10.*, <=6.6.*, 6.1.175, <=6.19.*, 4.13, <c63abf25203b50243fe228090526f9dbf37727bd, <93fc15be44a35b8e3c58d0238ac0d9b7c53465ff, <=6.18.*, 5.10.258, <4.13, 2baec2c3f854d1f79c7bb28386484e144e864a14, 6.6.135, 6.19.13, <=*, <=5.15.*, 6.12.82, <b15b1ce96777b88989a6a4de8d01efbcd81ad2d7) est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• https://git.kernel.org/stable/c/3e47a38e584b905359fe0ce5be5165d1e8592a90
• https://git.kernel.org/stable/c/b15b1ce96777b88989a6a4de8d01efbcd81ad2d7
• https://git.kernel.org/stable/c/280efb85e9759881a9d31d0874baa04583cb6c09
• https://git.kernel.org/stable/c/93fc15be44a35b8e3c58d0238ac0d9b7c53465ff
• https://git.kernel.org/stable/c/c63abf25203b50243fe228090526f9dbf37727bd
• https://git.kernel.org/stable/c/3be718f659683ad89fad6f1eb66bee99727cae64
• https://git.kernel.org/stable/c/ac5f54691be06a32246179d41be2d73598036deb
• https://git.kernel.org/stable/c/146d4ab94cf129ee06cd467cb5c71368a6b5bad6