{"id":"CVE-2026-74681","summary":"usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg\n\nibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check\nin usbio_bulk_msg() compares it against txbuf_len — the bulk OUT\nendpoint size.  Both are taken independently from different endpoints\nin usbio_probe(), so the check is wrong when they differ.\n\nUse rxbuf_len for the IN direction.  This matches the buffer that\nactually holds the response data.","modified":"2026-08-24T11:47:20.809682480Z","published":"2026-08-22T15:32:48.873Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74681.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74681.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74681"},{"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":"121a0f839dbb397af5fabb701cea3e9983223e50"},{"fixed":"ebfd1e82ab0a6d26efd9bdd89de899215851f5bf"},{"fixed":"9ad0164f78b66b0b5eca3a5748cc94dd87e28124"},{"fixed":"7e22c9f79b200672f3e477421b6c9050d8cf70a5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74681.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74681.json"}}],"schema_version":"1.9.0"}