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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-43119

Bluetooth: hci_sync: annotate data-races around hdev->req_status

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: annotate data-races around hdev->req_status __hci_cmd_sync_sk() sets hdev->req_status under hdev->req_lock: hdev->req_status = HCI_REQ_PEND; However, several other functions read or write hdev->req_status without holding any lock: - hci_send_cmd_sync() reads req_status in hci_cmd_work (workqueue) - hci_cmd_sync_complete() reads/writes from HCI event completion - hci_cmd_sync_cancel() / hci_cmd_sync_cancel_sync() read/write - hci_abort_conn() reads in connection abort path Since __hci_cmd_sync_sk() runs on hdev->req_workqueue while hci_send_cmd_sync() runs on hdev->workqueue, these are different workqueues that can execute concurrently on different CPUs. The plain C accesses constitute a data race. Add READ_ONCE()/WRITE_ONCE() annotations on all concurrent accesses to hdev->req_status to prevent potential compiler optimizations that could affect correctness (e.g., load fusing in the wait_event condition or store reordering).

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • f80c5dad7b6467b884c445ffea45985793b4b2d0 to < ff5855e8891e1e2490741366d087fd2fbcaabc4aaffected
  • f80c5dad7b6467b884c445ffea45985793b4b2d0 to < e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4affected
  • f80c5dad7b6467b884c445ffea45985793b4b2d0 to < 6e539907c0d11f514c5e0b049b27b04dff48a5b1affected
  • f80c5dad7b6467b884c445ffea45985793b4b2d0 to < a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27affected
  • f80c5dad7b6467b884c445ffea45985793b4b2d0 to < 40734ce8efc34c4a0d0222855798c0dc14b65f2eaffected
  • f80c5dad7b6467b884c445ffea45985793b4b2d0 to < b6807cfc195ef99e1ac37b2e1e60df40295daa8caffected
  • 8603d49906b231bbcd9141db7d096fa1041bc379affected
  • 0e061885bfcd65ef5d09f154f3c3c3491cc7544aaffected
  • a3d50fb7ce931f08a2c6194fdc4c9a56c9ed4153affected
  • 4.19.47 to < 4.20affected
  • 5.0.20 to < 5.1affected
  • 5.1.6 to < 5.2affected

Linux Linux

Default version status: affected

  • 5.2affected
  • 0 to < 5.2unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.83 to ≤ 6.12.*unaffected
  • 6.18.24 to ≤ 6.18.*unaffected
  • 6.19.14 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References