HighFix available
Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.12.96, 6.18.39, 7.1.4
- CVEs
- CVE-2026-68085
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 17:35 UTC · Revision 1
Source evidence
Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled
core-osv · Original sourcePublished 10 Aug 2026, 11:51 UTC
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.
osv:CVE-2026-68085
Kernel
Fixed versions: 6.12.96, 6.18.39, 7.1.4
Complete source record
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