CVE-2026-53073 (GCVE-0-2026-53073)
Vulnerability from cvelistv5
Published
2026-06-24 16:30
Modified
2026-06-24 16:30
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
Impacted products
Vendor Product Version
Linux Linux Version: a40f94f7caa8d3421b64f63ac31bc0f24c890f39
Version: 9e5a0f5777162e503400c70c6ed25fbbe2d38799
Version: 80f14e9de6a43a0bd8194cad1003a3e6dcbc3984
Version: 02e1bcdfdf769974e7e9fa285e295cd9852e2a38
Version: 281782d2c6730241e300d630bb9f200d831ede71
Version: 5df5dafc171b90d0b8d51547a82657cd5a1986c7
Version: 5df5dafc171b90d0b8d51547a82657cd5a1986c7
Version: 5df5dafc171b90d0b8d51547a82657cd5a1986c7
Version: 1dcf08fcff5ca529de6dc0395091f28854f4e54a
Version: 8e5aff600539e5faea294d9612cca50220e602b8
Version: db7509fa110dd9b11134b75894677f30353b2c51
Version: 5.10.237   ≤
Version: 5.15.181   ≤
Version: 6.1.135   ≤
Version: 6.6.88   ≤
Version: 6.12.24   ≤
Version: 5.4.293   ≤
Version: 6.13.12   ≤
Version: 6.14.3   ≤
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{
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:30:14.463Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232"
        },
        {
          "url": "https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b"
        },
        {
          "url": "https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474"
        },
        {
          "url": "https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104"
        },
        {
          "url": "https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718"
        }
      ],
      "title": "Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53073",
    "datePublished": "2026-06-24T16:30:14.463Z",
    "dateReserved": "2026-06-09T07:44:35.383Z",
    "dateUpdated": "2026-06-24T16:30:14.463Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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