{"id":"CVE-2026-46140","summary":"Bluetooth: btmtk: validate WMT event SKB length before struct access","details":"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.","modified":"2026-07-08T08:13:40.228263532Z","published":"2026-05-28T09:35:56.104Z","related":["openSUSE-SU-2026:10954-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46140.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179"},{"type":"WEB","url":"https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206"},{"type":"WEB","url":"https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46140.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46140"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f0457842215438786e2e205ad06a4fbb8ab63cd0"},{"fixed":"36c85f7029484d5ede769f8873d16e9c8e35533c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d019930b0049fc2648a6b279893d8ad330596e81"},{"fixed":"c411cf1bfde951cfa821809cf4020ba177f76e0c"},{"fixed":"624fb79dadc1b65757986a9d0fdde5c0cf3fe179"},{"fixed":"70d37a8b9229e394cc17ddad47e90b81d80fcd09"},{"fixed":"634a4408c0615c523cf7531790f4f14a422b9206"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.142"},{"fixed":"6.6.144"}]}],"versions":["v6.6.143","v6.6.142"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46140.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.144"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.88"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.11.0"},{"fixed":"6.18.30"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"7.0.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46140.json"}}],"schema_version":"1.7.5"}