CVE-2026-68085
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled
HCI_UART_SENDING bit in tx_state means write_work is pending and blocks
queueing it again. Currently this bit is not cleared when canceling the
work in hci_uart_close(), which blocks future writes when device is
reopened later if write_work was pending.
Fix by clearing HCI_UART_SENDING when canceling the work.
Also make clearing of tx_skb safe by using disable_work_sync +
enable_work instead of just cancel_work_sync. hci_uart_flush() purges
the proto tx queue so we can cancel the pending write_work there,
instead of doing it just in hci_uart_close(). Re-enable and possibly
requeue the work after queue flush.
https://git.kernel.org/stable/c/1b0d946d6f08bd39211385bc703a440911b41e46
https://git.kernel.org/stable/c/714d861d35d937f23375a4517569b13917bbbe51
https://git.kernel.org/stable/c/b9dd39cf1667e378b25a082ca796d495d578c5d3
https://git.kernel.org/stable/c/d52446b3e735cfdbdc2a58342163803bc2e64249