{"api_version":"1","generated_at":"2026-05-09T12:58:45+00:00","cve":"CVE-2026-43334","urls":{"html":"https://cve.report/CVE-2026-43334","api":"https://cve.report/api/cve/CVE-2026-43334.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43334","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43334"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 14:16:43","updated_at":"2026-05-08 14:16:43"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040","name":"https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3","name":"https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb","name":"https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9","name":"https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea","name":"https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7","name":"https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183","name":"https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7","name":"https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43334","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43334","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 425a22c5373d4e1b46492ab869074ebeeade61f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 7ab69426e7ecbd18a222ee2ec87ca612d30197d7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 01bb4045d2306c266178f49ce0c3576d237a3040 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 91649c02c1baaa18cedf7fb425fa1f0f852c8183 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 fa14e0e19820b1bbdb42185c9c4efa950bcffef9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 ec17efb1ef91506cfd17a77692eaf4bbacb520ea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.253 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.134 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/smp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"425a22c5373d4e1b46492ab869074ebeeade61f3","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"7ab69426e7ecbd18a222ee2ec87ca612d30197d7","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"01bb4045d2306c266178f49ce0c3576d237a3040","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"91649c02c1baaa18cedf7fb425fa1f0f852c8183","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"fa14e0e19820b1bbdb42185c9c4efa950bcffef9","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"ec17efb1ef91506cfd17a77692eaf4bbacb520ea","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"},{"lessThan":"d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7","status":"affected","version":"2b64d153a0cc9d2b60e47be013cde8490f16e0a5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/smp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.3"},{"lessThan":"3.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.134","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.134","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"3.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-05-08T13:31:20.923Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3"},{"url":"https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7"},{"url":"https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040"},{"url":"https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183"},{"url":"https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb"},{"url":"https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9"},{"url":"https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea"},{"url":"https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7"}],"title":"Bluetooth: SMP: force responder MITM requirements before building the pairing response","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43334","datePublished":"2026-05-08T13:31:20.923Z","dateReserved":"2026-05-01T14:12:56.002Z","dateUpdated":"2026-05-08T13:31:20.923Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 14:16:43","lastModifiedDate":"2026-05-08 14:16:43","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43334","Ordinal":"1","Title":"Bluetooth: SMP: force responder MITM requirements before buildin","CVE":"CVE-2026-43334","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43334","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Bluetooth: SMP: force responder MITM requirements before buildin"}]}}}