High 8.4Published Aug 15, 2026

CVE-2026-74497ALSA: usb-audio: Clamp frame size in implicit-feedback mode

Updated under an hour ago (Oct 26, 2026, 4:23 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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

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

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.