CVE-2026-74497

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 3.1

8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

Published

2026-08-15

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

References

• https://git.kernel.org/stable/c/09cf3dbbb4256a43feb91d2f51f274510a9ada47
• https://git.kernel.org/stable/c/2d39fea6d3c19a2f5811d123114d92e3d0115fd1
• https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64
• https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9
• https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901

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