{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46140","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-13T15:03:33.100Z","datePublished":"2026-05-28T09:35:56.104Z","dateUpdated":"2026-07-04T11:50:42.029Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-04T11:50:42.029Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btmtk.c"],"versions":[{"version":"f0457842215438786e2e205ad06a4fbb8ab63cd0","lessThan":"36c85f7029484d5ede769f8873d16e9c8e35533c","status":"affected","versionType":"git"},{"version":"d019930b0049fc2648a6b279893d8ad330596e81","lessThan":"c411cf1bfde951cfa821809cf4020ba177f76e0c","status":"affected","versionType":"git"},{"version":"d019930b0049fc2648a6b279893d8ad330596e81","lessThan":"624fb79dadc1b65757986a9d0fdde5c0cf3fe179","status":"affected","versionType":"git"},{"version":"d019930b0049fc2648a6b279893d8ad330596e81","lessThan":"70d37a8b9229e394cc17ddad47e90b81d80fcd09","status":"affected","versionType":"git"},{"version":"d019930b0049fc2648a6b279893d8ad330596e81","lessThan":"634a4408c0615c523cf7531790f4f14a422b9206","status":"affected","versionType":"git"},{"version":"6.6.142","lessThan":"6.6.144","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btmtk.c"],"versions":[{"version":"6.11","status":"affected"},{"version":"0","lessThan":"6.11","status":"unaffected","versionType":"semver"},{"version":"6.6.144","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.88","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.30","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.7","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.142","versionEndExcluding":"6.6.144"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c"},{"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"}}}}