{"id":"CVE-2026-43018","revision":null,"records":[{"revision":"3f8c520821234bd599d71144d9996600","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43018","aliases":[],"title":"Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_le_remote_conn_param_req_evt, otherwise it's possible it is freed\nconcurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage.","state":0,"publishedAt":"2026-05-01T14:15:22.308+00:00","modifiedAt":"2026-10-19T19:06:09.619+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/hci_event.c\"\n ],\n \"versions\": [\n {\n \"version\": \"95118dd4edfec950898a00180c6f998df0a6406d\",\n \"lessThan\": \"59eecf0ffde15670e6a5e10c47be67f73d843b20\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"95118dd4edfec950898a00180c6f998df0a6406d\",\n \"lessThan\": \"5fb69e1eeea9d6cba80517e9f058b56b34bc3a81\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"95118dd4edfec950898a00180c6f998df0a6406d\",\n \"lessThan\": \"7cadb03be37e761130edb153544fe0770a842b19\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"95118dd4edfec950898a00180c6f998df0a6406d\",\n \"lessThan\": \"1d0bdbfe3e91c11f0a704c52443a9446a10d699c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"95118dd4edfec950898a00180c6f998df0a6406d\",\n \"lessThan\": \"ea3cd36d7382d5f8309df04c275d20df139ed42c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"95118dd4edfec950898a00180c6f998df0a6406d\",\n \"lessThan\": \"b255531b27da336571411248c2a72a350662bd09\",\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/hci_event.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.17\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.17\",\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/59eecf0ffde15670e6a5e10c47be67f73d843b20","https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81","https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19","https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c","https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c","https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43018","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43018","identifiers":["CVE-2026-43018"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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