{"id":"CVE-2026-74497","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74497","summary":"ALSA: usb-audio: Clamp frame size in implicit-feedback mode","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Clamp frame size in implicit-feedback mode\n\nsnd_usb_handle_sync_urb() scales received sync packet sizes by the sender's\nstride and stores the result directly in out_packet->packet_size[i]. If a\nconnected USB device sends an oversized sync packet, this frame count can\nexceed ep->maxframesize.\n\nThe un-clamped frame count then propagates to the playback endpoint queue,\npotentially driving packet transfers beyond the endpoint's hardware frame\nlimits.\n\nCap the calculated frame count against ep->maxframesize in\nsnd_usb_handle_sync_urb() to prevent oversized packets from entering the\nplayback queue.","published":"2026-08-15T12:27:24.494Z","modified":"2026-08-18T03:56:49.484009178Z","cvss":{"score":8.4,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.151"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64"},{"type":"WEB","url":"https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74497.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74497"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:49.484009178Z"}}