{"api_version":"1","generated_at":"2026-05-28T20:29:12+00:00","cve":"CVE-2026-46140","urls":{"html":"https://cve.report/CVE-2026-46140","api":"https://cve.report/api/cve/CVE-2026-46140.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46140","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46140"},"summary":{"title":"Bluetooth: btmtk: validate WMT event SKB length before struct access","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtk: validate WMT event SKB length before struct access\n\nbtmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to\nstruct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc\n(9 bytes) without first checking that the SKB contains enough data.\nA short firmware response causes out-of-bounds reads from SKB tailroom.\n\nUse skb_pull_data() to validate and advance past the base WMT event\nheader. For the FUNC_CTRL case, pull the additional status field bytes\nbefore accessing them.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-28 10:16:29","updated_at":"2026-05-28 13:44:01"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206","name":"https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179","name":"https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09","name":"https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c","name":"https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46140","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46140","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d019930b0049fc2648a6b279893d8ad330596e81 c411cf1bfde951cfa821809cf4020ba177f76e0c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d019930b0049fc2648a6b279893d8ad330596e81 624fb79dadc1b65757986a9d0fdde5c0cf3fe179 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d019930b0049fc2648a6b279893d8ad330596e81 70d37a8b9229e394cc17ddad47e90b81d80fcd09 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d019930b0049fc2648a6b279893d8ad330596e81 634a4408c0615c523cf7531790f4f14a422b9206 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.88 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.30 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.7 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc3 * 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":["drivers/bluetooth/btmtk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c411cf1bfde951cfa821809cf4020ba177f76e0c","status":"affected","version":"d019930b0049fc2648a6b279893d8ad330596e81","versionType":"git"},{"lessThan":"624fb79dadc1b65757986a9d0fdde5c0cf3fe179","status":"affected","version":"d019930b0049fc2648a6b279893d8ad330596e81","versionType":"git"},{"lessThan":"70d37a8b9229e394cc17ddad47e90b81d80fcd09","status":"affected","version":"d019930b0049fc2648a6b279893d8ad330596e81","versionType":"git"},{"lessThan":"634a4408c0615c523cf7531790f4f14a422b9206","status":"affected","version":"d019930b0049fc2648a6b279893d8ad330596e81","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/bluetooth/btmtk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.88","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.30","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.88","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.30","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.7","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc3","versionStartIncluding":"6.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtk: validate WMT event SKB length before struct access\n\nbtmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to\nstruct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc\n(9 bytes) without first checking that the SKB contains enough data.\nA short firmware response causes out-of-bounds reads from SKB tailroom.\n\nUse skb_pull_data() to validate and advance past the base WMT event\nheader. For the FUNC_CTRL case, pull the additional status field bytes\nbefore accessing them."}],"providerMetadata":{"dateUpdated":"2026-05-28T09:35:56.104Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c"},{"url":"https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179"},{"url":"https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09"},{"url":"https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206"}],"title":"Bluetooth: btmtk: validate WMT event SKB length before struct access","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46140","datePublished":"2026-05-28T09:35:56.104Z","dateReserved":"2026-05-13T15:03:33.100Z","dateUpdated":"2026-05-28T09:35:56.104Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-28 10:16:29","lastModifiedDate":"2026-05-28 13:44:01","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46140","Ordinal":"1","Title":"Bluetooth: btmtk: validate WMT event SKB length before struct ac","CVE":"CVE-2026-46140","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46140","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtk: validate WMT event SKB length before struct access\n\nbtmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to\nstruct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc\n(9 bytes) without first checking that the SKB contains enough data.\nA short firmware response causes out-of-bounds reads from SKB tailroom.\n\nUse skb_pull_data() to validate and advance past the base WMT event\nheader. For the FUNC_CTRL case, pull the additional status field bytes\nbefore accessing them.","Type":"Description","Title":"Bluetooth: btmtk: validate WMT event SKB length before struct ac"}]}}}