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 senders 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 endpoints 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/2db4535d6af79276a64449201c5be5feffb31c64
- https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9
- https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901
- https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61
- https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a