CVE-2026-53072

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls hci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm() assumes it is held, and if conn is deleted concurrently -> UAF. Only SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen, and HCI_EV_CONN_REQUEST is not generated for ISO. In the non-deferred listening socket code paths, hci_connect_cfm(conn) is called with hdev->lock held. Fix by holding the lock.

• Linux Kernel

  OS
  Linux
  3.17 – 5.10.258 (excl.)5.11 – 5.15.209 (excl.)5.16 – 6.1.175 (excl.)6.2 – 6.6.141 (excl.)6.7 – 6.12.91 (excl.)6.13 – 6.18.33 (excl.)6.19 – 7.0.10 (excl.)