{"api_version":"1","generated_at":"2026-07-24T22:40:59+00:00","cve":"CVE-2026-53072","urls":{"html":"https://cve.report/CVE-2026-53072","api":"https://cve.report/api/cve/CVE-2026-53072.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53072","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53072"},"summary":{"title":"Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER\n\nWhen protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls\nhci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm()\nassumes it is held, and if conn is deleted concurrently -> UAF.\n\nOnly SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen,\nand HCI_EV_CONN_REQUEST is not generated for ISO.  In the non-deferred\nlistening socket code paths, hci_connect_cfm(conn) is called with\nhdev->lock held.\n\nFix by holding the lock.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:21","updated_at":"2026-07-21 17:40:24"},"problem_types":["CWE-667"],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4","name":"https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314","name":"https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065","name":"https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a","name":"https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3","name":"https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e","name":"https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2","name":"https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f","name":"https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53072","name":"CVE 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the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER\n\nWhen protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls\nhci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm()\nassumes it is held, and if conn is deleted concurrently -> UAF.\n\nOnly SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen,\nand HCI_EV_CONN_REQUEST is not generated for ISO.  In the non-deferred\nlistening socket code paths, hci_connect_cfm(conn) is called with\nhdev->lock held.\n\nFix by holding the lock."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-06-28T06:38:58.197Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4"},{"url":"https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e"},{"url":"https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314"},{"url":"https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065"},{"url":"https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f"},{"url":"https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3"},{"url":"https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a"},{"url":"https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2"}],"title":"Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53072","datePublished":"2026-06-24T16:30:13.570Z","dateReserved":"2026-06-09T07:44:35.383Z","dateUpdated":"2026-06-28T06:38:58.197Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 17:17:21","lastModifiedDate":"2026-07-21 17:40:24","problem_types":["CWE-667"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"5.10.258","matchCriteriaId":"37B46C04-3431-4B85-8620-D8CE4E2FDE0F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.209","matchCriteriaId":"919C10A9-7951-4A74-BADD-C135A0A8D8B4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.175","matchCriteriaId":"92385813-D91D-480D-83A1-F423D2CBB2BA"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.141","matchCriteriaId":"97A9FFFA-22BB-4D5C-9790-5A2286E392F7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.91","matchCriteriaId":"C918746B-DE6F-448F-A93E-A04C5481688D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.33","matchCriteriaId":"96D99E49-380D-43AB-BDBA-25C3AD018A9C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0.10","matchCriteriaId":"A13475D2-59BF-4716-94B5-7C1D239A2CF4"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53072","Ordinal":"1","Title":"Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_","CVE":"CVE-2026-53072","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53072","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER\n\nWhen protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls\nhci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm()\nassumes it is held, and if conn is deleted concurrently -> UAF.\n\nOnly SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen,\nand HCI_EV_CONN_REQUEST is not generated for ISO.  In the non-deferred\nlistening socket code paths, hci_connect_cfm(conn) is called with\nhdev->lock held.\n\nFix by holding the lock.","Type":"Description","Title":"Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_"}]}}}