CVE-2026-74497

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

State: Published
Severity: 8.4 High
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 15, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 2d39fea6d3c19a2f5811d123114d92e3d0115fd1Affected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 09cf3dbbb4256a43feb91d2f51f274510a9ada47Affected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7beAffected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 56ac3e7c90f6b45969c3fd07a98fad760ffd6901Affected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before be97fea7451d758881b95af78e900dd0d58a382aAffected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 2db4535d6af79276a64449201c5be5feffb31c64Affected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 53f0aa37eb945f3c983f61d12fc35eb33debb8a9Affected 28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 8d7a30c50c2e58a6839634ed0acde14466d1dc61Affected
LinuxLinux	3.8Affected before 3.8Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.151 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.44 through 6.18.Not affected 7.1.8 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 2d39fea6d3c19a2f5811d123114d92e3d0115fd1Affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 09cf3dbbb4256a43feb91d2f51f274510a9ada47Affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7beAffected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 56ac3e7c90f6b45969c3fd07a98fad760ffd6901Affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before be97fea7451d758881b95af78e900dd0d58a382aAffected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 2db4535d6af79276a64449201c5be5feffb31c64Affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 53f0aa37eb945f3c983f61d12fc35eb33debb8a9Affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550 to before 8d7a30c50c2e58a6839634ed0acde14466d1dc61Affected

LinuxLinux

3.8Affected
before 3.8Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.151 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.44 through 6.18.*Not affected
7.1.8 through 7.1.*Not affected
7.2 and laterNot affected

References

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