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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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
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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)
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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() 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-04T08:01:10+00:00",
      "cve": "CVE-2026-53073",
      "id": "CVE-2026-53073",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:fixed": "612",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53073.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T16:41:03Z",
      "cve": "CVE-2026-53073",
      "id": "CVE-2026-53073",
      "initial_release_date": "2026-07-01T03:19:11Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "639",
      "product_status:known_not_affected": "93",
      "product_status:recommended": "333",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53073",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53073.json",
      "version": "10"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.