CVE-2026-74497ALSA: usb-audio: Clamp frame size in implicit-feedback mode
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Clamp frame size in implicit-feedback mode snd_usb_handle_sync_urb() scales received sync packet sizes by the sender's stride and stores the result directly in out_packet->packet_size[i]. If a connected USB device sends an oversized sync packet, this frame count can exceed ep->maxframesize. The un-clamped frame count then propagates to the playback endpoint queue, potentially driving packet transfers beyond the endpoint's hardware frame limits. Cap the calculated frame count against ep->maxframesize in snd_usb_handle_sync_urb() to prevent oversized packets from entering the playback queue.
- CVSS
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 28acb12014fb0c3e1edfdab1b1e3e266cf651550 builds before 2d39fea6d3c19a2f5811d123114d92e3d0115fd1; 28acb12014fb0c3e1edfdab1b1e3e266cf651550 builds before 09cf3dbbb4256a43feb91d2f51f274510a9ada47; from 28acb12014fb0c3e1edfdab1b1e3e266cf651550 before cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be; from 28acb12014fb0c3e1edfdab1b1e3e266cf651550 before 56ac3e7c90f6b45969c3fd07a98fad760ffd6901; from 28acb12014fb0c3e1edfdab1b1e3e266cf651550 before be97fea7451d758881b95af78e900dd0d58a382a; 28acb12014fb0c3e1edfdab1b1e3e266cf651550 builds before 2db4535d6af79276a64449201c5be5feffb31c64; from 28acb12014fb0c3e1edfdab1b1e3e266cf651550 before 53f0aa37eb945f3c983f61d12fc35eb33debb8a9; 28acb12014fb0c3e1edfdab1b1e3e266cf651550 builds before 8d7a30c50c2e58a6839634ed0acde14466d1dc61 | CNA record |
References
- https://git.kernel.org/stable/c/2d39fea6d3c19a2f5811d123114d92e3d0115fd1
- https://git.kernel.org/stable/c/09cf3dbbb4256a43feb91d2f51f274510a9ada47
- https://git.kernel.org/stable/c/cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be
- https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901
- https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a
- https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64
- https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9
- https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.