{"id":"CVE-2026-68085","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68085","summary":"Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled\n\nHCI_UART_SENDING bit in tx_state means write_work is pending and blocks\nqueueing it again.  Currently this bit is not cleared when canceling the\nwork in hci_uart_close(), which blocks future writes when device is\nreopened later if write_work was pending.\n\nFix by clearing HCI_UART_SENDING when canceling the work.\n\nAlso make clearing of tx_skb safe by using disable_work_sync +\nenable_work instead of just cancel_work_sync.  hci_uart_flush() purges\nthe proto tx queue so we can cancel the pending write_work there,\ninstead of doing it just in hci_uart_close().  Re-enable and possibly\nrequeue the work after queue flush.","published":"2026-08-10T11:51:39.079Z","modified":"2026-08-14T04:03:32.151099333Z","cvss":{"score":8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.96"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1b0d946d6f08bd39211385bc703a440911b41e46"},{"type":"WEB","url":"https://git.kernel.org/stable/c/714d861d35d937f23375a4517569b13917bbbe51"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9dd39cf1667e378b25a082ca796d495d578c5d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d52446b3e735cfdbdc2a58342163803bc2e64249"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68085.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68085"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:03:32.151099333Z"}}