{"id":"CVE-2026-64126","revision":null,"records":[{"revision":"87c1d90fb7214e1e9e10bd9a3e18a2e1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64126","aliases":[],"title":"Bluetooth: MGMT: validate Add Extended Advertising Data length","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: validate Add Extended Advertising Data length\n\nMGMT_OP_ADD_EXT_ADV_DATA is registered as a variable-length command,\nwith MGMT_ADD_EXT_ADV_DATA_SIZE as the fixed header size. The handler\nthen uses cp->adv_data_len and cp->scan_rsp_len to validate and copy\ncp->data, but it never checks that those bytes are part of the mgmt\ncommand payload.\n\nA short command can therefore make add_ext_adv_data() pass an\nout-of-bounds pointer into tlv_data_is_valid(). If the bytes beyond\nthe command buffer are addressable, they can also be copied into the\nadvertising instance as scan response data, where the caller can read\nthem back via MGMT_OP_GET_ADV_INSTANCE. The trigger requires\nCAP_NET_ADMIN in the initial user namespace; KASAN reports an 8-byte\nslab-out-of-bounds read.\n\nReject commands whose length does not match the fixed header plus both\nadvertising data lengths before parsing cp->data.","state":0,"publishedAt":"2026-07-19T15:40:23.276+00:00","modifiedAt":"2026-10-19T20:28:13.544+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/mgmt.c\"\n ],\n \"versions\": [\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"0d5104390b445e7bd664ad583837e4c04d892c9d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"14b01b9cba04e6ce82825f68fc4c4322fa4ffa43\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"a143ce77a5292f2c9285137433d879ce71d190a7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"a6c75a3fad226ccbd8ef9110dee87c92c299f2ab\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"f1febe93ef075314615f970a87681d9ab86691d1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"0bc1a5a69f541859293d79db72bd7854ac48df51\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12410572833a283ce92fcf9679ca8a2f372097ee\",\n \"lessThan\": \"d3f7d17960ed50df3a6709c5158caff989c8c905\",\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/mgmt.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.210\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.142\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.92\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.34\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.11\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","score":7.3,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0d5104390b445e7bd664ad583837e4c04d892c9d","https://git.kernel.org/stable/c/14b01b9cba04e6ce82825f68fc4c4322fa4ffa43","https://git.kernel.org/stable/c/a143ce77a5292f2c9285137433d879ce71d190a7","https://git.kernel.org/stable/c/a6c75a3fad226ccbd8ef9110dee87c92c299f2ab","https://git.kernel.org/stable/c/f1febe93ef075314615f970a87681d9ab86691d1","https://git.kernel.org/stable/c/0bc1a5a69f541859293d79db72bd7854ac48df51","https://git.kernel.org/stable/c/d3f7d17960ed50df3a6709c5158caff989c8c905"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64126","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64126","identifiers":["CVE-2026-64126"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-08T18:47:41.4173610+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T18:47:41.417361+00:00","lastSuccessAt":"2026-11-08T18:47:41.7296264+00:00","error":null,"lastVerifiedAt":"2026-11-08T18:47:41.7296273+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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