{"id":"CVE-2026-98292","summary":"Bluetooth: btmtksdio, btmtkuart: validate WMT event length before struct access","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtksdio, btmtkuart: validate WMT event length before struct access\n\nbtmtksdio.c and btmtkuart.c cast a received WMT event straight to\nstruct btmtk_hci_wmt_evt and read its op/flag fields without checking\nthe event is long enough to contain them, unlike btmtk.c. The\nFUNC_CTRL case then further casts to struct btmtk_hci_wmt_evt_funcc\nand reads its 2-byte status field, again without a length check.\nFirmware that sends a short or malformed WMT event makes both drivers\nread past the end of the received SKB.\n\nMirror btmtk.c: validate the base WMT header with skb_pull_data()\nbefore touching any of its fields, and when a FUNC_CTRL event turns\nout to be the short, header-only form (a plain enable/disable ack\nwith no status word), decode the result from the header's own flag\nbyte instead (0 = success, otherwise failure).\n\nVerified setup on MT7920, MT7921, MT7922 and MT7925: no regression.","modified":"2026-10-07T02:47:30.453529490Z","published":"2026-10-06T08:45:51.807Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98292.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a5cfd8488c97e1b8939515429fe4c81e9f2df4f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8879e3e0a84a86954c855caceead4867e74a9a27"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98292.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98292"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e0b67035a90b58d01f911fed77b6e3da153da66e"},{"fixed":"5a5cfd8488c97e1b8939515429fe4c81e9f2df4f"},{"fixed":"8879e3e0a84a86954c855caceead4867e74a9a27"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98292.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.1.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98292.json"}}],"schema_version":"1.9.0"}