CVE-2026-74497

HIGH 8.4

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

CVSS Score

8.4

EPSS Score

0.1%

EPSS Percentile

4th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Aug 15, 2026
Last Updated	Aug 19, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Linux / Linux

28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2d39fea6d3c19a2f5811d123114d92e3d0115fd1 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 09cf3dbbb4256a43feb91d2f51f274510a9ada47 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < be97fea7451d758881b95af78e900dd0d58a382a 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2db4535d6af79276a64449201c5be5feffb31c64 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9 28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 8d7a30c50c2e58a6839634ed0acde14466d1dc61

Linux / Linux

3.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗