CVE-2026-43119 (GCVE-0-2026-43119)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:18
VLAI?
Title
Bluetooth: hci_sync: annotate data-races around hdev->req_status
Summary
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).
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f80c5dad7b6467b884c445ffea45985793b4b2d0 , < 6e539907c0d11f514c5e0b049b27b04dff48a5b1 (git)
Affected: f80c5dad7b6467b884c445ffea45985793b4b2d0 , < a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27 (git)
Affected: f80c5dad7b6467b884c445ffea45985793b4b2d0 , < 40734ce8efc34c4a0d0222855798c0dc14b65f2e (git)
Affected: f80c5dad7b6467b884c445ffea45985793b4b2d0 , < b6807cfc195ef99e1ac37b2e1e60df40295daa8c (git)
Affected: 8603d49906b231bbcd9141db7d096fa1041bc379 (git)
Affected: 0e061885bfcd65ef5d09f154f3c3c3491cc7544a (git)
Affected: a3d50fb7ce931f08a2c6194fdc4c9a56c9ed4153 (git)
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Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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            "net/bluetooth/hci_conn.c",
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}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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