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CVE-2026-74497

HIGHCVSS 8.4/10EPSS 0.14%

Last modified

CVE-2026-74497 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. 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.. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.4/10

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

EPSS Probability
0.14%

4.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 2d39fea6d3c19a2f5811d123114d92e3d0115fd1; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 09cf3dbbb4256a43feb91d2f51f274510a9ada47; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < be97fea7451d758881b95af78e900dd0d58a382a; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 2db4535d6af79276a64449201c5be5feffb31c64; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9; >= 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 8d7a30c50c2e58a6839634ed0acde14466d1dc61
LinuxLinux3.8

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-74497?
CVE-2026-74497 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74497?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST