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CVE-2026-64405

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, a13f316e90fdb1fb6df6582e845aa9b3270f3581, e4511a67fcdba9729d1c7cfc6d2e645c765ce801, <83b22d7f7c384564fa42c3cf19bec715c693d7a2, 6.18.39, <6.5, 0, <61701912c58a05f6a043f097cc177a964abef348, <=7.1.*, 6.1.83, 4ab81f16c68a602b2b69e333ae08d8748a9398de, 7.1.4, <6.6, 6.5.3, 6.1.118, <=6.6.*, 6.12.97, <6.1.118, 6.4.16, <b42cb640a0493d16b61ddd267420274be15efdc1, <12917f591cea1af36087dba5b9ec888652f0b42a, 6.6, <=6.18.*, <70c397b62ee015e19b3924d9da741c8dda017819, 6.6.145, <903227b6168bb99fd57d4e3c9c1b5014986198e0, <=*, 6083089ab00631617f9eac678df3ab050a9d837a, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix null ptr deref in hci_abort_conn() hci_abort_conn() read hci_skb_event(hdev->sent_cmd) when a connection was pending, but hdev->sent_cmd can be NULL while req_status is still HCI_REQ_PEND, leading to a NULL pointer dereference and a general protection fault from the hci_rx_work() receive path. Instead of inspecting hdev->sent_cmd, track the in-flight create connection command with a new per-connection HCI_CONN_CREATE flag and route all cancellation through hci_cancel_connect_sync(), which dispatches to a dedicated per-type cancel function. The create command is in exactly one of two states: still queued, or in flight. The cancel function holds cmd_sync_work_lock across the whole decision: the worker takes this lock to dequeue every entry, so while it is held a queued command cannot start running and an in-flight command cannot complete and let the next command become pending. This keeps the flag test and hci_cmd_sync_cancel() atomic with respect to the worker, so a queued command is simply dequeued, and an in-flight command owned by this connection is cancelled without the risk of cancelling an unrelated command that became pending in the meantime. CIS uses the same flag mechanism via HCI_CONN_CREATE_CIS but cannot be dequeued per-connection. hci_acl_create_conn_sync() and hci_le_create_conn_sync() clear HCI_CONN_CREATE after the create command completes, but the command status handler can free conn via hci_conn_del() (for example when the controller rejects the connection) while the worker is still blocked on the connection complete event. Hold a reference on conn across the create command so the flag can be cleared without a use-after-free.

Gravité et risque d'exploitation

CVE-2026-64405 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 0.12 %, ce qui la place devant 1.6 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, a13f316e90fdb1fb6df6582e845aa9b3270f3581, e4511a67fcdba9729d1c7cfc6d2e645c765ce801, <83b22d7f7c384564fa42c3cf19bec715c693d7a2, 6.18.39, <6.5, 0, <61701912c58a05f6a043f097cc177a964abef348, <=7.1.*, 6.1.83, 4ab81f16c68a602b2b69e333ae08d8748a9398de, 7.1.4, <6.6, 6.5.3, 6.1.118, <=6.6.*, 6.12.97, <6.1.118, 6.4.16, <b42cb640a0493d16b61ddd267420274be15efdc1, <12917f591cea1af36087dba5b9ec888652f0b42a, 6.6, <=6.18.*, <70c397b62ee015e19b3924d9da741c8dda017819, 6.6.145, <903227b6168bb99fd57d4e3c9c1b5014986198e0, <=*, 6083089ab00631617f9eac678df3ab050a9d837a, 7.2) 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

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