{"id":"CVE-2026-74497","title":"ALSA: usb-audio: Clamp frame size in implicit-feedback mode","summary":"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 di…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2d39fea6d3c19a2f5811d123114d92e3d0115fd1","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 09cf3dbbb4256a43feb91d2f51f274510a9ada47","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < be97fea7451d758881b95af78e900dd0d58a382a","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2db4535d6af79276a64449201c5be5feffb31c64","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9","Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 8d7a30c50c2e58a6839634ed0acde14466d1dc61","Linux 3.8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:58:20.810517Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:50.570Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74497","references":[{"url":"https://git.kernel.org/stable/c/2d39fea6d3c19a2f5811d123114d92e3d0115fd1"},{"url":"https://git.kernel.org/stable/c/09cf3dbbb4256a43feb91d2f51f274510a9ada47"},{"url":"https://git.kernel.org/stable/c/cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be"},{"url":"https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901"},{"url":"https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a"},{"url":"https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64"},{"url":"https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9"},{"url":"https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61"}],"tags":["cve.org"],"epss":0.00142,"epssPercentile":0.03116,"ingestedAt":"2026-10-16T19:46:24.353Z","slug":"CVE-2026-74497","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2d39fea6d3c19a2f5811d123114d92e3d0115fd1`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 09cf3dbbb4256a43feb91d2f51f274510a9ada47`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < be97fea7451d758881b95af78e900dd0d58a382a`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2db4535d6af79276a64449201c5be5feffb31c64`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9`\n- `Linux >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 8d7a30c50c2e58a6839634ed0acde14466d1dc61`\n- `Linux 3.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}