Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-07 17:14

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

Linux

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

Vendor

Product

Version

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

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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          "programFiles": [
            "net/bluetooth/hci_conn.c",
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          "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)."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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          "url": "https://git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6807cfc195ef99e1ac37b2e1e60df40295daa8c"
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      ],
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    "cveId": "CVE-2026-43119",
    "datePublished": "2026-05-06T07:40:43.257Z",
    "dateReserved": "2026-05-01T14:12:55.987Z",
    "dateUpdated": "2026-05-07T17:14:14.525Z",
    "state": "PUBLISHED"
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      "date": "2026-05-10",
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  }
}

GHSA-PP2P-VFWH-22HM

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-06 12:30

Details

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).

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-43119"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T10:16:25Z",
    "severity": null
  },
  "details": "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": "GHSA-pp2p-vfwh-22hm",
  "modified": "2026-05-06T12:30:28Z",
  "published": "2026-05-06T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43119"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e539907c0d11f514c5e0b049b27b04dff48a5b1"
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      "url": "https://git.kernel.org/stable/c/a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27"
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    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

FKIE_CVE-2026-43119

Vulnerability from fkie_nvd - Published: 2026-05-06 10:16 - Updated: 2026-05-06 13:07

Severity ?

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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": "2026-05-06T13:07:51.607",
  "metrics": {},
  "published": "2026-05-06T10:16:25.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e539907c0d11f514c5e0b049b27b04dff48a5b1"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b6807cfc195ef99e1ac37b2e1e60df40295daa8c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Undergoing Analysis"
}

MSRC_CVE-2026-43119

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-05-08 01:39

Summary

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

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-43119

None Available There is no fix available for this vulnerability as of now

References

URL

Category

	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
	https://support.microsoft.com/lifecycle	external
	https://www.first.org/cvss	external
	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
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    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
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      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
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        "category": "self",
        "summary": "CVE-2026-43119 Bluetooth: hci_sync: annotate data-races around hdev-\u003ereq_status - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-43119.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Bluetooth: hci_sync: annotate data-races around hdev-\u003ereq_status",
    "tracking": {
      "current_release_date": "2026-05-08T01:39:44.000Z",
      "generator": {
        "date": "2026-05-08T07:05:39.075Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-43119",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-07T01:09:16.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-05-07T14:42:07.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Information published."
        },
        {
          "date": "2026-05-08T01:39:44.000Z",
          "legacy_version": "2",
          "number": "3",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 kernel 0:6.6.137.1-2.azl3",
                "product": {
                  "name": "azl3 kernel 0:6.6.137.1-2.azl3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "kernel"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 kernel 0:6.6.137.1-2.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-43119",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-43119 Bluetooth: hci_sync: annotate data-races around hdev-\u003ereq_status - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-43119.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-05-07T01:09:16.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "title": "Bluetooth: hci_sync: annotate data-races around hdev-\u003ereq_status"
    }
  ]
}

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

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

GHSA-PP2P-VFWH-22HM

FKIE_CVE-2026-43119

MSRC_CVE-2026-43119

Tags

Sightings

Nomenclature