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 v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61
https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a
https://git.kernel.org/stable/c/cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 13:17

Updated : 2026-08-19 17:21

NVD link : CVE-2026-74497

Mitre link : CVE-2026-74497

CVE.ORG link : CVE-2026-74497

JSON object : View

Products Affected

No product.

CWE

No CWE.

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If a\nconnected USB device sends an oversized sync packet, this frame count can\nexceed ep->maxframesize.\n\nThe un-clamped frame count then propagates to the playback endpoint queue,\npotentially driving packet transfers beyond the endpoint's hardware frame\nlimits.\n\nCap the calculated frame count against ep->maxframesize in\nsnd_usb_handle_sync_urb() to prevent oversized packets from entering the\nplayback queue."}], "lastModified": "2026-08-19T17:21:06.910", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}