Vulnerability-Lookup

FKIE_CVE-2026-43119

Vulnerability from fkie_nvd - Published: 2026-05-06 10:16 - Updated: 2026-05-12 21:36

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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).

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e539907c0d11f514c5e0b049b27b04dff48a5b1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b6807cfc195ef99e1ac37b2e1e60df40295daa8c	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: annotate data-races around hdev-\u003ereq_status\n\n__hci_cmd_sync_sk() sets hdev-\u003ereq_status under hdev-\u003ereq_lock:\n\n    hdev-\u003ereq_status = HCI_REQ_PEND;\n\nHowever, several other functions read or write hdev-\u003ereq_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-\u003ereq_workqueue while\nhci_send_cmd_sync() runs on hdev-\u003eworkqueue, 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-\u003ereq_status to prevent potential compiler optimizations that\ncould affect correctness (e.g., load fusing in the wait_event\ncondition or store reordering)."
    }
  ],
  "id": "CVE-2026-43119",
  "lastModified": "2026-05-12T21:36:28.793",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-06T10:16:25.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:18

Title

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

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/6e539907c0d11f514…
https://git.kernel.org/stable/c/a7a1cdb4a64ca74eb…
https://git.kernel.org/stable/c/40734ce8efc34c4a0…
https://git.kernel.org/stable/c/b6807cfc195ef99e1…

Impacted products

2 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)
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)

Show details on NVD website

JSON

To clipboard

{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_conn.c",
            "net/bluetooth/hci_core.c",
            "net/bluetooth/hci_sync.c"
          ],
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        "shortName": "Linux"
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    "datePublished": "2026-05-06T07:40:43.257Z",
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    "dateUpdated": "2026-05-11T22:18:07.528Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43119

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

Tags

Sightings

Nomenclature