FKIE_CVE-2026-53072

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-28 08:16
Severity
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls hci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm() assumes it is held, and if conn is deleted concurrently -> UAF. Only SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen, and HCI_EV_CONN_REQUEST is not generated for ISO. In the non-deferred listening socket code paths, hci_connect_cfm(conn) is called with hdev->lock held. Fix by holding the lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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": "60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "c7777f534a8018ae4bb1c80d8925af4df588a314",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "6b4d226d01ab7da0d2027a2a1e3a6079152e5065",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "385b2d0468a0871fc716c549fa3b0c257c7dbcb3",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "c27224daf0b08efbb2b24ed64b6139b294f5473a",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "versionType": "git"
            },
            {
              "lessThan": "5c7209a341ff2ac338b2b0375c34a307b37c9ac2",
              "status": "affected",
              "version": "70c464256310e1c3716099b9d02ece4169272f73",
              "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": "3.17"
            },
            {
              "lessThan": "3.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER\n\nWhen protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls\nhci_connect_cfm(conn) without hdev-\u003elock. Generally hci_connect_cfm()\nassumes it is held, and if conn is deleted concurrently -\u003e UAF.\n\nOnly SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen,\nand HCI_EV_CONN_REQUEST is not generated for ISO.  In the non-deferred\nlistening socket code paths, hci_connect_cfm(conn) is called with\nhdev-\u003elock held.\n\nFix by holding the lock."
    }
  ],
  "id": "CVE-2026-53072",
  "lastModified": "2026-06-28T08:16:32.620",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-24T17:17:21.017",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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