CVE-2026-31499

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del() l2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer and id_addr_timer while holding conn->lock. However, the work functions l2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire conn->lock, creating a potential AB-BA deadlock if the work is already executing when l2cap_conn_del() takes the lock. Move the work cancellations before acquiring conn->lock and use disable_delayed_work_sync() to additionally prevent the works from being rearmed after cancellation, consistent with the pattern used in hci_conn_del().

• linux linux kernel (>= 6.6.84 < 6.7) • linux linux kernel (>= 6.12.20 < 6.13) • linux linux kernel (>= 6.13.8 < 6.14) • linux linux kernel (>= 6.14.1 < 6.18.21) • linux linux kernel (>= 6.19 < 6.19.11) • linux linux kernel 6.14 • linux linux kernel 7.0