CVE-2026-96406
VIDEO class descriptor walk consumes device-controlled wTotalLength as its bound
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.
Attack profile
How easy it is to exploit
- Attack vector
- Physical
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
VIDEO class descriptor walk consumes device-controlled wTotalLength as its bound
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.
- Record
CVE-2026-96406- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-105002
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.
- Record
EUVD-2026-105002- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-96406- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
VIDEO class descriptor walk consumes device-controlled wTotalLength as its bound
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.
- Record
CVE-2026-96406- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-96406 is a medium vulnerability (CVSS 4.9) in Eclipse Foundation Threadx - Usbx, published October 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. No source names a fixed version.