{"id":"CVE-2026-43334","revision":null,"records":[{"revision":"5432f561530e4be2bc2c2297866cb574","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43334","aliases":[],"title":"Bluetooth: SMP: force responder MITM requirements before building the pairing response","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SMP: force responder MITM requirements before building the pairing response\n\nsmp_cmd_pairing_req() currently builds the pairing response from the\ninitiator auth_req before enforcing the local BT_SECURITY_HIGH\nrequirement. If the initiator omits SMP_AUTH_MITM, the response can\nalso omit it even though the local side still requires MITM.\n\ntk_request() then sees an auth value without SMP_AUTH_MITM and may\nselect JUST_CFM, making method selection inconsistent with the pairing\npolicy the responder already enforces.\n\nWhen the local side requires HIGH security, first verify that MITM can\nbe achieved from the IO capabilities and then force SMP_AUTH_MITM in the\nresponse in both rsp.auth_req and auth. This keeps the responder auth bits\nand later method selection aligned.","state":0,"publishedAt":"2026-05-08T13:31:20.923+00:00","modifiedAt":"2026-10-19T19:16:26.745+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bluetooth/smp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"425a22c5373d4e1b46492ab869074ebeeade61f3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"7ab69426e7ecbd18a222ee2ec87ca612d30197d7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"01bb4045d2306c266178f49ce0c3576d237a3040\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"91649c02c1baaa18cedf7fb425fa1f0f852c8183\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"fa14e0e19820b1bbdb42185c9c4efa950bcffef9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"ec17efb1ef91506cfd17a77692eaf4bbacb520ea\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2b64d153a0cc9d2b60e47be013cde8490f16e0a5\",\n \"lessThan\": \"d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bluetooth/smp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.3\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.3\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.253\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.203\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.168\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.134\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.81\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.22\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.12\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3","https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7","https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040","https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183","https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb","https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9","https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea","https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43334","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43334","identifiers":["CVE-2026-43334"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-45d47722bca14f09ac26662adb699591","complete":true,"records":13654,"lastAttemptAt":"2026-11-08T20:47:46.9443819+00:00","lastSuccessAt":"2026-11-08T20:47:46.939+00:00","error":null,"lastVerifiedAt":"2026-11-08T20:47:46.939+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T20:47:20.5771248+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T20:47:20.5771248+00:00","lastSuccessAt":"2026-11-08T20:47:20.7706986+00:00","error":null,"lastVerifiedAt":"2026-11-08T20:47:20.7706996+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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