Answer in brief
CVE-2026-43119 records a Medium severity (CVSS 5.5) vulnerability in Bluetooth: hci_sync: annotate data-races around hdev->req_status. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f80c5dad7b6467b884c445ffea45985793b4b2d0 <ff5855e8891e1e2490741366d087fd2fbcaabc4a || >=f80c5dad7b6467b884c445ffea45985793b4b2d0 <e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4 || >=f80c5dad7b6467b884c445ffea45985793b4b2d0 <6e539907c0d11f514c5e0b049b27b04dff48a5b1 || >=f80c5dad7b6467b884c445ffea45985793b4b2d0 <a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27 || >=f80c5dad7b6467b884c445ffea45985793b4b2d0 <40734ce8efc34c4a0d0222855798c0dc14b65f2e || >=f80c5dad7b6467b884c445ffea45985793b4b2d0 <b6807cfc195ef99e1ac37b2e1e60df40295daa8c || 8603d49906b231bbcd9141db7d096fa1041bc379 || 0e061885bfcd65ef5d09f154f3c3c3491cc7544a || a3d50fb7ce931f08a2c6194fdc4c9a56c9ed4153 || >=4.19.47 <4.20 || >=5.0.20 <5.1 || >=5.1.6 <5.2 | ff5855e8891e1e2490741366d087fd2fbcaabc4a, e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4, 6e539907c0d11f514c5e0b049b27b04dff48a5b1, a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27, 40734ce8efc34c4a0d0222855798c0dc14b65f2e, b6807cfc195ef99e1ac37b2e1e60df40295daa8c, 4.20, 5.1, 5.2 |
| Linux/Linuxgeneric | 5.2 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 30, 2026
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).
Quoted source text, attributed separately from HOL analysis.