{"id":"CVE-2026-74531","revision":null,"records":[{"revision":"b1b643c1a8614ea2beb710db87a732a1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74531","aliases":[],"title":"Bluetooth: hci_conn: hold conn reference in abort_conn_sync()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: hold conn reference in abort_conn_sync()\n\nThere is theoretical UAF if the conn is freed while the hci_sync task is\nrunning.\n\nHold refcount to avoid that.","state":0,"publishedAt":"2026-08-15T12:27:45.988+00:00","modifiedAt":"2026-10-16T19:05:53.525+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_conn.c\"\n ],\n \"versions\": [\n {\n \"version\": \"249c88e7fb45b6b705040c5af4bd0d0f2bc9735c\",\n \"lessThan\": \"64d1645f26aa49b5a86ba2fccd0bb6749ea725a6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"227a0cdf4a028a73dc256d0f5144b4808d718893\",\n \"lessThan\": \"963fb4b8e7d1ab07b4ae45bf15d41e667c88caca\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"227a0cdf4a028a73dc256d0f5144b4808d718893\",\n \"lessThan\": \"e8f9fef362bab431d95371d3406bc720350290c3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"227a0cdf4a028a73dc256d0f5144b4808d718893\",\n \"lessThan\": \"fa812cfa81aa3d4a7b6ce8277979af57b3f79712\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"227a0cdf4a028a73dc256d0f5144b4808d718893\",\n \"lessThan\": \"5761d003daa987ac81463f570713ce9c9dd204e5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7fe4d391e937c2f048a43ff4b421e677f10d83c0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"58afdc9b18871eb1d461c725be9e9f3f44a39aeb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6.6.51\",\n \"lessThan\": \"6.6.151\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.184\",\n \"lessThan\": \"6.2\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.10.10\",\n \"lessThan\": \"6.11\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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_conn.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.151\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.103\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.44\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.8\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\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/64d1645f26aa49b5a86ba2fccd0bb6749ea725a6","https://git.kernel.org/stable/c/963fb4b8e7d1ab07b4ae45bf15d41e667c88caca","https://git.kernel.org/stable/c/e8f9fef362bab431d95371d3406bc720350290c3","https://git.kernel.org/stable/c/fa812cfa81aa3d4a7b6ce8277979af57b3f79712","https://git.kernel.org/stable/c/5761d003daa987ac81463f570713ce9c9dd204e5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74531","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74531","identifiers":["CVE-2026-74531"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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