CVE-2026-96406 VIDEO class descriptor walk consumes device-controlled wTotalLength as its bound
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-96406?
CVE-2026-96406 is a medium-severity vulnerability in Eclipse ThreadX - USBX, published on 20 Oct 2026.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-96406?
How do I fix CVE-2026-96406?
No fix has been published for CVE-2026-96406 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-96406 being exploited?
There is no known exploitation of CVE-2026-96406 in the wild and no public exploit code.
Sources
Also known as GHSA-8qf6-hjvf-g68f.