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CVE-2026-53072 (GCVE-0-2026-53072)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-08-05 12:33
VLAI
Title
Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER
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.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4 (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < c7777f534a8018ae4bb1c80d8925af4df588a314 (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 6b4d226d01ab7da0d2027a2a1e3a6079152e5065 (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 385b2d0468a0871fc716c549fa3b0c257c7dbcb3 (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < c27224daf0b08efbb2b24ed64b6139b294f5473a (git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 5c7209a341ff2ac338b2b0375c34a307b37c9ac2 (git)
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Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (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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In the non-deferred\\nlistening socket code paths, hci_connect_cfm(conn) is called with\\nhdev-\u003elock held.\\n\\nFix by holding the 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-14T11:47:31+00:00",
      "cve": "CVE-2026-53072",
      "id": "CVE-2026-53072",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:fixed": "612",
      "product_status:known_affected": "84",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53072.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-12T16:41:05Z",
      "cve": "CVE-2026-53072",
      "id": "CVE-2026-53072",
      "initial_release_date": "2026-07-01T03:19:13Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "204",
      "product_status:recommended": "484",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53072",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53072.json",
      "version": "11"
    }
  }
}



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Taxonomy of the tags.





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.