Hello, Our fuzzer found six spec violations, illegal state transition. 1. BT_CONNECT2 -> BT_CONFIG by L2CAP_CONN_RSP 2. BT_CONNECT2 -> BT_CONNECTED by L2CAP_CONF_RSP 3. BT_CONNECT2 -> BT_DISCONN by L2CAP_CONF_RSP 4. BT_CONNECTED -> BT_CONFIG by L2CAP_CONN_RSP 5. BT_DISCONN -> BT_CONFIG by L2CAP_CONN_RSP 6. BT_DISCONN -> BT_CONNECTED by L2CAP_CONN_RSP All expected behaviors are ignoring incoming packets as described in the spec v5.3 | Vol 3, Part A 6. STATE MACHINE. Also, I assumed BT_CONNECT2 is corresponding to WAIT_CONNECT in the spec.