CVE-2026-19935 Use-after-free of an L2CAP CoC channel object in the Zephyr Bluetooth host: RX work item is not cancelled on channel teardown

The Bluetooth LE host queues received L2CAP connection-oriented channel CoC data for deferred processing through a struct kwork embedded in the channel object lechan-rxwork, handler l2caprxprocess whenever the channel uses a dynamic PSM 0x0080-0x00FF. Channel teardown in l2capchandestroy in...