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CVE-2026-68085

Unknown

Last modified

CVE-2026-68085 is a vulnerability of currently unknown severity. 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.

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 81c7a3c22a0f2808cf4ae0b4908f59763b23606d, < d52446b3e735cfdbdc2a58342163803bc2e64249; >= 192cb0f1ca706d9a1bc36ae0ad5f666d1e4fd894, < b9dd39cf1667e378b25a082ca796d495d578c5d3; >= c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b, < 714d861d35d937f23375a4517569b13917bbbe51; >= c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b, < 1b0d946d6f08bd39211385bc703a440911b41e46; 78aad93e938f013d9272fe0ee168f27883afa95c; e2d19969c8d9198ecc3090bcd5312ecd503a3339; c85cff648a2bc92322912db5f1727ad05afae7b6; 9d20d48be2c4a071fb015eb09bda2cecd25daf34; 7338031946bd06f6dff149e67b60c4cd083bfea8; >= 6.12.92, < 6.12.96; >= 6.18.34, < 6.18.39; >= 5.10.258, < 5.11; >= 5.15.209, < 5.16; >= 6.1.175, < 6.2; >= 6.6.142, < 6.7; >= 7.0.11, < 7.1
LinuxLinux7.1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68085?
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.
How severe is CVE-2026-68085?
Severity scoring for CVE-2026-68085 is pending analysis.
How do I fix CVE-2026-68085?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST