{"id":"CVE-2026-43134","revision":null,"records":[{"revision":"2c2b39a3b4824b648329e673e443d789","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43134","aliases":[],"title":"Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ\n\nThis adds a check for encryption key size upon receiving\nL2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which\nexpects L2CAP_CR_LE_BAD_KEY_SIZE.","state":0,"publishedAt":"2026-05-06T11:27:21.541+00:00","modifiedAt":"2026-10-19T19:16:21.882+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/l2cap_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"335071c0c3637064ec250481f589075db44fe4e6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"fa6ad76fa8623c0a50d529cd5726fa5d819a3be4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"9118601ff90b79e8df3c0c98f48ae00c1b02ecef\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"481ea39b342c347b6ac029f3d418486280be4e45\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"ec91078e132179b04e0c3906b599816c056ceaad\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"96581749c7c14fbec32c35728520867929600041\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"8dd43f9a9323f9c01bc8246da8d81a4c783c9e97\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d\",\n \"lessThan\": \"138d7eca445ef37a0333425d269ee59900ca1104\",\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/l2cap_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.14\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.14\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.252\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.202\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.165\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.128\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.75\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.16\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.6\",\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:N","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/335071c0c3637064ec250481f589075db44fe4e6","https://git.kernel.org/stable/c/fa6ad76fa8623c0a50d529cd5726fa5d819a3be4","https://git.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecef","https://git.kernel.org/stable/c/481ea39b342c347b6ac029f3d418486280be4e45","https://git.kernel.org/stable/c/ec91078e132179b04e0c3906b599816c056ceaad","https://git.kernel.org/stable/c/96581749c7c14fbec32c35728520867929600041","https://git.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97","https://git.kernel.org/stable/c/138d7eca445ef37a0333425d269ee59900ca1104"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43134","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43134","identifiers":["CVE-2026-43134"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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