CVE-2026-68392

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: mgmt: fix locking in unpair_device/disconnect_sync

Dereferencing RCU-protected pointers outside critical sections is
invalid and may lead to UAF.

Take hdev->lock for hci_conn lookup and hci_abort_conn().  Don't use RCU
to ensure the conn is fully initialized at this point.