CVE-2026-64010

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: Fix use-after-free race in nfc_llcp_recv_cc() A race condition exists in the NFC LLCP connection state machine where the connection acceptance packet (CC) can be processed concurrently with socket release. This can lead to a use-after-free of the socket object. When nfc_llcp_recv_cc() moves the socket from the connecting_sockets list to the sockets list, it does so without holding the socket lock. If llcp_sock_release() is executing concurrently, it might have already unlinked the socket and dropped its references, which can result in nfc_llcp_recv_cc() linking a freed socket into the live list. Fix this by holding lock_sock() during the state transition and list movement in nfc_llcp_recv_cc(). After acquiring the lock, check if the socket is still hashed to ensure it hasn't already been unlinked and marked for destruction by the release path. This aligns the locking pattern with recv_hdlc() and recv_disc().

Gravité et risque d'exploitation

CVE-2026-64010 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.20 %, ce qui la place devant 8.8 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=7.0.*, <ee2d1a8a1833c5e56e9a1745e64b0b4edda732c2, <=6.12.*, 6.12.93, <bd08bb7443c501d2f2a71d529e4afcf11c9b07d2, 0, 6.18.35, 6.1.176, <ad8a27d63cac96bac441edd002209ebd996e12fb, <3.6, 5.15.210, <=5.10.*, <=6.6.*, 3.6, <0b45c31746e1523d5d482fda8fcf54a35ac417f1, <dce85215a6c7b0fd753f577a4c487f647119884c, <650bdd8fdfab64a09ee474150313dbc48c374795, <b2a60f7f846faaf5c2cdad4ea6d3a33e5f863183, 7.1, <=6.18.*, a69f32af86e389dd232b1bb2269e202c1bfcc60f, 7.0.12, <=*, <=5.15.*, 6.6.143, <b493ea2765cc17cb8aa7e7544a4b6dcb05b6ed77, 5.10.259) 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/dce85215a6c7b0fd753f577a4c487f647119884c
• https://git.kernel.org/stable/c/bd08bb7443c501d2f2a71d529e4afcf11c9b07d2
• https://git.kernel.org/stable/c/0b45c31746e1523d5d482fda8fcf54a35ac417f1
• https://git.kernel.org/stable/c/ee2d1a8a1833c5e56e9a1745e64b0b4edda732c2
• https://git.kernel.org/stable/c/ad8a27d63cac96bac441edd002209ebd996e12fb
• https://git.kernel.org/stable/c/650bdd8fdfab64a09ee474150313dbc48c374795
• https://git.kernel.org/stable/c/b2a60f7f846faaf5c2cdad4ea6d3a33e5f863183
• https://git.kernel.org/stable/c/b493ea2765cc17cb8aa7e7544a4b6dcb05b6ed77