Vulnerability-Lookup

GHSA-V6C2-56H6-9PGQ

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently.

Extend the hci_dev_lock critical section to cover all conn usage in both handlers.

Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46056"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:25Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in SSP passkey handlers\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise\nthe connection can be freed concurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage in both\nhandlers.\n\nKeep the existing keypress notification behavior unchanged by routing\nthe early exits through a common unlock path.",
  "id": "GHSA-v6c2-56h6-9pgq",
  "modified": "2026-05-27T15:33:22Z",
  "published": "2026-05-27T15:33:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46056"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46056 (GCVE-0-2026-46056)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:57 – Updated: 2026-05-27 12:57

Title

Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/204028af77a265e31…
https://git.kernel.org/stable/c/01a6431766c35dfed…
https://git.kernel.org/stable/c/e08d75753db17aa94…
https://git.kernel.org/stable/c/8c6443bb9257b7809…
https://git.kernel.org/stable/c/85fa3512048793076…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 92a25256f142d55e25f9959441cea6ddeabae57e , < 204028af77a265e31ceb4ba7f643349a3cca72b2 (git) Affected: 92a25256f142d55e25f9959441cea6ddeabae57e , < 01a6431766c35dfedb86e0cb5d3fc80c6d604a47 (git) Affected: 92a25256f142d55e25f9959441cea6ddeabae57e , < e08d75753db17aa943d7622f09d9c217b5bfd3b8 (git) Affected: 92a25256f142d55e25f9959441cea6ddeabae57e , < 8c6443bb9257b780986fb67ec08565bf48ecb8d7 (git) Affected: 92a25256f142d55e25f9959441cea6ddeabae57e , < 85fa3512048793076eef658f66489112dcc91993 (git)
Linux	Linux	Affected: 3.7 Unaffected: 0 , < 3.7 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "204028af77a265e31ceb4ba7f643349a3cca72b2",
              "status": "affected",
              "version": "92a25256f142d55e25f9959441cea6ddeabae57e",
              "versionType": "git"
            },
            {
              "lessThan": "01a6431766c35dfedb86e0cb5d3fc80c6d604a47",
              "status": "affected",
              "version": "92a25256f142d55e25f9959441cea6ddeabae57e",
              "versionType": "git"
            },
            {
              "lessThan": "e08d75753db17aa943d7622f09d9c217b5bfd3b8",
              "status": "affected",
              "version": "92a25256f142d55e25f9959441cea6ddeabae57e",
              "versionType": "git"
            },
            {
              "lessThan": "8c6443bb9257b780986fb67ec08565bf48ecb8d7",
              "status": "affected",
              "version": "92a25256f142d55e25f9959441cea6ddeabae57e",
              "versionType": "git"
            },
            {
              "lessThan": "85fa3512048793076eef658f66489112dcc91993",
              "status": "affected",
              "version": "92a25256f142d55e25f9959441cea6ddeabae57e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.7"
            },
            {
              "lessThan": "3.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc1",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in SSP passkey handlers\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise\nthe connection can be freed concurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage in both\nhandlers.\n\nKeep the existing keypress notification behavior unchanged by routing\nthe early exits through a common unlock path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:57:15.150Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47"
        },
        {
          "url": "https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993"
        }
      ],
      "title": "Bluetooth: hci_event: fix potential UAF in SSP passkey handlers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46056",
    "datePublished": "2026-05-27T12:57:15.150Z",
    "dateReserved": "2026-05-13T15:03:33.094Z",
    "dateUpdated": "2026-05-27T12:57:15.150Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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

GHSA-V6C2-56H6-9PGQ

CVE-2026-46056 (GCVE-0-2026-46056)

Tags

Sightings

Nomenclature