{"api_version":"1","generated_at":"2026-07-20T14:43:35+00:00","cve":"CVE-2026-64126","urls":{"html":"https://cve.report/CVE-2026-64126","api":"https://cve.report/api/cve/CVE-2026-64126.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64126","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64126"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:54","updated_at":"2026-07-19 16:17:54"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0bc1a5a69f541859293d79db72bd7854ac48df51","name":"https://git.kernel.org/stable/c/0bc1a5a69f541859293d79db72bd7854ac48df51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3f7d17960ed50df3a6709c5158caff989c8c905","name":"https://git.kernel.org/stable/c/d3f7d17960ed50df3a6709c5158caff989c8c905","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a6c75a3fad226ccbd8ef9110dee87c92c299f2ab","name":"https://git.kernel.org/stable/c/a6c75a3fad226ccbd8ef9110dee87c92c299f2ab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f1febe93ef075314615f970a87681d9ab86691d1","name":"https://git.kernel.org/stable/c/f1febe93ef075314615f970a87681d9ab86691d1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a143ce77a5292f2c9285137433d879ce71d190a7","name":"https://git.kernel.org/stable/c/a143ce77a5292f2c9285137433d879ce71d190a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/14b01b9cba04e6ce82825f68fc4c4322fa4ffa43","name":"https://git.kernel.org/stable/c/14b01b9cba04e6ce82825f68fc4c4322fa4ffa43","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0d5104390b445e7bd664ad583837e4c04d892c9d","name":"https://git.kernel.org/stable/c/0d5104390b445e7bd664ad583837e4c04d892c9d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64126","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64126","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee 0d5104390b445e7bd664ad583837e4c04d892c9d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee 14b01b9cba04e6ce82825f68fc4c4322fa4ffa43 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee a143ce77a5292f2c9285137433d879ce71d190a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee a6c75a3fad226ccbd8ef9110dee87c92c299f2ab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee f1febe93ef075314615f970a87681d9ab86691d1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee 0bc1a5a69f541859293d79db72bd7854ac48df51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12410572833a283ce92fcf9679ca8a2f372097ee d3f7d17960ed50df3a6709c5158caff989c8c905 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.210 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.142 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * 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/mgmt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0d5104390b445e7bd664ad583837e4c04d892c9d","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"},{"lessThan":"14b01b9cba04e6ce82825f68fc4c4322fa4ffa43","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"},{"lessThan":"a143ce77a5292f2c9285137433d879ce71d190a7","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"},{"lessThan":"a6c75a3fad226ccbd8ef9110dee87c92c299f2ab","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"},{"lessThan":"f1febe93ef075314615f970a87681d9ab86691d1","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"},{"lessThan":"0bc1a5a69f541859293d79db72bd7854ac48df51","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"},{"lessThan":"d3f7d17960ed50df3a6709c5158caff989c8c905","status":"affected","version":"12410572833a283ce92fcf9679ca8a2f372097ee","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/mgmt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.11"},{"lessThan":"5.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-07-19T15:40:23.276Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0d5104390b445e7bd664ad583837e4c04d892c9d"},{"url":"https://git.kernel.org/stable/c/14b01b9cba04e6ce82825f68fc4c4322fa4ffa43"},{"url":"https://git.kernel.org/stable/c/a143ce77a5292f2c9285137433d879ce71d190a7"},{"url":"https://git.kernel.org/stable/c/a6c75a3fad226ccbd8ef9110dee87c92c299f2ab"},{"url":"https://git.kernel.org/stable/c/f1febe93ef075314615f970a87681d9ab86691d1"},{"url":"https://git.kernel.org/stable/c/0bc1a5a69f541859293d79db72bd7854ac48df51"},{"url":"https://git.kernel.org/stable/c/d3f7d17960ed50df3a6709c5158caff989c8c905"}],"title":"Bluetooth: MGMT: validate Add Extended Advertising Data length","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64126","datePublished":"2026-07-19T15:40:23.276Z","dateReserved":"2026-07-19T07:54:57.036Z","dateUpdated":"2026-07-19T15:40:23.276Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:54","lastModifiedDate":"2026-07-19 16:17:54","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64126","Ordinal":"1","Title":"Bluetooth: MGMT: validate Add Extended Advertising Data length","CVE":"CVE-2026-64126","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64126","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Bluetooth: MGMT: validate Add Extended Advertising Data length"}]}}}