CVE-2026-96406

VIDEO class descriptor walk consumes device-controlled wTotalLength as its bound

Published Oct 20, 2026 CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Description
A VideoStreaming interface reports the size of its whole class-specific descriptor block in the `wTotalLength` field of its input header. The USBX host recorded that figure and used it as the budget for walking the format, frame and frame-interval descriptors, without holding it against the configuration descriptor actually received.



A device that reports a `wTotalLength` larger than the descriptors it supplies therefore had its own claim believed. Once the real bytes ran out the walk kept going, dereferencing the cursor past the end of the configuration buffer, in the host's context, whenever the application queried format or frame data.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
First Time appeared Eclipse
Eclipse threadx Usbx
Vendors & Products Eclipse
Eclipse threadx Usbx
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A VideoStreaming interface reports the size of its whole class-specific descriptor block in the `wTotalLength` field of its input header. The USBX host recorded that figure and used it as the budget for walking the format, frame and frame-interval descriptors, without holding it against the configuration descriptor actually received. A device that reports a `wTotalLength` larger than the descriptors it supplies therefore had its own claim believed. Once the real bytes ran out the walk kept going, dereferencing the cursor past the end of the configuration buffer, in the host's context, whenever the application queried format or frame data.
Title VIDEO class descriptor walk consumes device-controlled wTotalLength as its bound
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Oct 20, 2026, 3:28 PM
Reserved
Sep 23, 2026, 1:42 PM
Status
Awaiting Analysis
Published
Oct 20, 2026, 2:17 PM
Modified
Oct 20, 2026, 7:48 PM