FKIE_CVE-2026-53073

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and setting hu->hdev to NULL. This means incoming UART data will reach the protocol-specific recv handler in hci_uart_tty_receive() after resources are freed. Clear HCI_UART_PROTO_INIT with a write lock before calling hu->proto->close() and setting hu->hdev to NULL. The write lock ensures all active readers have completed and no new reader can enter the protocol recv path before resources are freed. This allows the protocol-specific recv functions to remove the "HCI_UART_REGISTERED" guard without risking a null pointer dereference if hci_register_dev() fails.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_ldisc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07",
              "status": "affected",
              "version": "a40f94f7caa8d3421b64f63ac31bc0f24c890f39",
              "versionType": "git"
            },
            {
              "lessThan": "ed4033fb85ccaaf6c3983be3c7b037e48253d232",
              "status": "affected",
              "version": "9e5a0f5777162e503400c70c6ed25fbbe2d38799",
              "versionType": "git"
            },
            {
              "lessThan": "356dee1bcac4d0d9152390561fa63331ebff211b",
              "status": "affected",
              "version": "80f14e9de6a43a0bd8194cad1003a3e6dcbc3984",
              "versionType": "git"
            },
            {
              "lessThan": "a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40",
              "status": "affected",
              "version": "02e1bcdfdf769974e7e9fa285e295cd9852e2a38",
              "versionType": "git"
            },
            {
              "lessThan": "f4b69c35813c432973d340d3600c01de106ed474",
              "status": "affected",
              "version": "281782d2c6730241e300d630bb9f200d831ede71",
              "versionType": "git"
            },
            {
              "lessThan": "3daa5818e473ed60eb69d8b5c71b651909d28c5a",
              "status": "affected",
              "version": "5df5dafc171b90d0b8d51547a82657cd5a1986c7",
              "versionType": "git"
            },
            {
              "lessThan": "194f029a4d7f739e44ebc1f473120187b4de5104",
              "status": "affected",
              "version": "5df5dafc171b90d0b8d51547a82657cd5a1986c7",
              "versionType": "git"
            },
            {
              "lessThan": "68d39ea5e0adc9ecaea1ce8abd842ec972eb8718",
              "status": "affected",
              "version": "5df5dafc171b90d0b8d51547a82657cd5a1986c7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1dcf08fcff5ca529de6dc0395091f28854f4e54a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8e5aff600539e5faea294d9612cca50220e602b8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "db7509fa110dd9b11134b75894677f30353b2c51",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.258",
              "status": "affected",
              "version": "5.10.237",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.209",
              "status": "affected",
              "version": "5.15.181",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.175",
              "status": "affected",
              "version": "6.1.135",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.141",
              "status": "affected",
              "version": "6.6.88",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.91",
              "status": "affected",
              "version": "6.12.24",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.293",
              "versionType": "semver"
            },
            {
              "lessThan": "6.14",
              "status": "affected",
              "version": "6.13.12",
              "versionType": "semver"
            },
            {
              "lessThan": "6.15",
              "status": "affected",
              "version": "6.14.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_ldisc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "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: hci_ldisc: Clear HCI_UART_PROTO_INIT on error\n\nWhen hci_register_dev() fails in hci_uart_register_dev()\nHCI_UART_PROTO_INIT is not cleared before calling hu-\u003eproto-\u003eclose(hu)\nand setting hu-\u003ehdev to NULL. This means incoming UART data will reach\nthe protocol-specific recv handler in hci_uart_tty_receive() after\nresources are freed.\n\nClear HCI_UART_PROTO_INIT with a write lock before calling\nhu-\u003eproto-\u003eclose() and setting hu-\u003ehdev to NULL. The write lock ensures\nall active readers have completed and no new reader can enter the\nprotocol recv path before resources are freed.\n\nThis allows the protocol-specific recv functions to remove the\n\"HCI_UART_REGISTERED\" guard without risking a null pointer dereference\nif hci_register_dev() fails."
    }
  ],
  "id": "CVE-2026-53073",
  "lastModified": "2026-06-24T17:17:21.163",
  "metrics": {},
  "published": "2026-06-24T17:17:21.163",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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