{"id":"CVE-2026-43119","title":"Bluetooth: hci_sync: annotate data-races around hdev->req_status","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: annotate data-races around hdev->req_status\n\n__hci_cmd_sync_sk() sets hdev->req_status under hdev->req_lock:\n\n    hdev->req_status = HCI_REQ_PEND;\n…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < ff5855e8891e1e2490741366d087fd2fbcaabc4a","Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4","Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < 6e539907c0d11f514c5e0b049b27b04dff48a5b1","Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27","Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < 40734ce8efc34c4a0d0222855798c0dc14b65f2e","Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < b6807cfc195ef99e1ac37b2e1e60df40295daa8c","Linux 8603d49906b231bbcd9141db7d096fa1041bc379","Linux 0e061885bfcd65ef5d09f154f3c3c3491cc7544a","Linux a3d50fb7ce931f08a2c6194fdc4c9a56c9ed4153","Linux >= 4.19.47 < 4.20","Linux >= 5.0.20 < 5.1","Linux >= 5.1.6 < 5.2","Linux 5.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:28:43.636559Z"},"published":"2026-05-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:31.799Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43119","references":[{"url":"https://git.kernel.org/stable/c/ff5855e8891e1e2490741366d087fd2fbcaabc4a"},{"url":"https://git.kernel.org/stable/c/e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4"},{"url":"https://git.kernel.org/stable/c/6e539907c0d11f514c5e0b049b27b04dff48a5b1"},{"url":"https://git.kernel.org/stable/c/a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27"},{"url":"https://git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e"},{"url":"https://git.kernel.org/stable/c/b6807cfc195ef99e1ac37b2e1e60df40295daa8c"}],"tags":["cve.org"],"epss":0.00114,"epssPercentile":0.015,"ingestedAt":"2026-11-05T15:02:32.265Z","slug":"CVE-2026-43119","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: annotate data-races around hdev->req_status\n\n__hci_cmd_sync_sk() sets hdev->req_status under hdev->req_lock:\n\n    hdev->req_status = HCI_REQ_PEND;\n\nHowever, several other functions read or write hdev->req_status without\nholding any lock:\n\n  - hci_send_cmd_sync() reads req_status in hci_cmd_work (workqueue)\n  - hci_cmd_sync_complete() reads/writes from HCI event completion\n  - hci_cmd_sync_cancel() / hci_cmd_sync_cancel_sync() read/write\n  - hci_abort_conn() reads in connection abort path\n\nSince __hci_cmd_sync_sk() runs on hdev->req_workqueue while\nhci_send_cmd_sync() runs on hdev->workqueue, these are different\nworkqueues that can execute concurrently on different CPUs. The plain\nC accesses constitute a data race.\n\nAdd READ_ONCE()/WRITE_ONCE() annotations on all concurrent accesses\nto hdev->req_status to prevent potential compiler optimizations that\ncould affect correctness (e.g., load fusing in the wait_event\ncondition or store reordering).\n\n## Affected\n\n- `Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < ff5855e8891e1e2490741366d087fd2fbcaabc4a`\n- `Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4`\n- `Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < 6e539907c0d11f514c5e0b049b27b04dff48a5b1`\n- `Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27`\n- `Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < 40734ce8efc34c4a0d0222855798c0dc14b65f2e`\n- `Linux >= f80c5dad7b6467b884c445ffea45985793b4b2d0 < b6807cfc195ef99e1ac37b2e1e60df40295daa8c`\n- `Linux 8603d49906b231bbcd9141db7d096fa1041bc379`\n- `Linux 0e061885bfcd65ef5d09f154f3c3c3491cc7544a`\n- `Linux a3d50fb7ce931f08a2c6194fdc4c9a56c9ed4153`\n- `Linux >= 4.19.47 < 4.20`\n- `Linux >= 5.0.20 < 5.1`\n- `Linux >= 5.1.6 < 5.2`\n- `Linux 5.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}