CVEvulnerability
CVE-2026-74497
8.4 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-08-15
- Last modified
- 2026-10-16
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
References
- https://git.kernel.org/stable/c/09cf3dbbb4256a43feb91d2f51f274510a9ada47 git.kernel.org
- https://git.kernel.org/stable/c/2d39fea6d3c19a2f5811d123114d92e3d0115fd1 git.kernel.org
- https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64 git.kernel.org
- https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9 git.kernel.org
- https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901 git.kernel.org
- https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61 git.kernel.org
- https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a git.kernel.org
- https://git.kernel.org/stable/c/cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be git.kernel.org