CVE-2026-53073 (GCVE-0-2026-53073)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30
VLAI
Title
Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a40f94f7caa8d3421b64f63ac31bc0f24c890f39 , < ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07 (git)
Affected: 9e5a0f5777162e503400c70c6ed25fbbe2d38799 , < ed4033fb85ccaaf6c3983be3c7b037e48253d232 (git)
Affected: 80f14e9de6a43a0bd8194cad1003a3e6dcbc3984 , < 356dee1bcac4d0d9152390561fa63331ebff211b (git)
Affected: 02e1bcdfdf769974e7e9fa285e295cd9852e2a38 , < a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40 (git)
Affected: 281782d2c6730241e300d630bb9f200d831ede71 , < f4b69c35813c432973d340d3600c01de106ed474 (git)
Affected: 5df5dafc171b90d0b8d51547a82657cd5a1986c7 , < 3daa5818e473ed60eb69d8b5c71b651909d28c5a (git)
Affected: 5df5dafc171b90d0b8d51547a82657cd5a1986c7 , < 194f029a4d7f739e44ebc1f473120187b4de5104 (git)
Affected: 5df5dafc171b90d0b8d51547a82657cd5a1986c7 , < 68d39ea5e0adc9ecaea1ce8abd842ec972eb8718 (git)
Affected: 1dcf08fcff5ca529de6dc0395091f28854f4e54a (git)
Affected: 8e5aff600539e5faea294d9612cca50220e602b8 (git)
Affected: db7509fa110dd9b11134b75894677f30353b2c51 (git)
Affected: 5.10.237 , < 5.10.258 (semver)
Affected: 5.15.181 , < 5.15.209 (semver)
Affected: 6.1.135 , < 6.1.175 (semver)
Affected: 6.6.88 , < 6.6.141 (semver)
Affected: 6.12.24 , < 6.12.91 (semver)
Affected: 5.4.293 , < 5.5 (semver)
Affected: 6.13.12 , < 6.14 (semver)
Affected: 6.14.3 , < 6.15 (semver)
Create a notification for this product.
Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "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."
        }
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        "dateUpdated": "2026-06-24T16:30:14.463Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232"
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        {
          "url": "https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718"
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      ],
      "title": "Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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    "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"
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/bluetooth/hci_ldisc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a40f94f7caa8d3421b64f63ac31bc0f24c890f39\",\"lessThan\":\"ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9e5a0f5777162e503400c70c6ed25fbbe2d38799\",\"lessThan\":\"ed4033fb85ccaaf6c3983be3c7b037e48253d232\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"80f14e9de6a43a0bd8194cad1003a3e6dcbc3984\",\"lessThan\":\"356dee1bcac4d0d9152390561fa63331ebff211b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02e1bcdfdf769974e7e9fa285e295cd9852e2a38\",\"lessThan\":\"a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"281782d2c6730241e300d630bb9f200d831ede71\",\"lessThan\":\"f4b69c35813c432973d340d3600c01de106ed474\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5df5dafc171b90d0b8d51547a82657cd5a1986c7\",\"lessThan\":\"3daa5818e473ed60eb69d8b5c71b651909d28c5a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5df5dafc171b90d0b8d51547a82657cd5a1986c7\",\"lessThan\":\"194f029a4d7f739e44ebc1f473120187b4de5104\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5df5dafc171b90d0b8d51547a82657cd5a1986c7\",\"lessThan\":\"68d39ea5e0adc9ecaea1ce8abd842ec972eb8718\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1dcf08fcff5ca529de6dc0395091f28854f4e54a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8e5aff600539e5faea294d9612cca50220e602b8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"db7509fa110dd9b11134b75894677f30353b2c51\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.237\",\"lessThan\":\"5.10.258\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.181\",\"lessThan\":\"5.15.209\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.135\",\"lessThan\":\"6.1.175\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.88\",\"lessThan\":\"6.6.141\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.24\",\"lessThan\":\"6.12.91\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.293\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.13.12\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.14.3\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/bluetooth/hci_ldisc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.