CVE Catalog

CVE-2026-90030

HighCVSS 7.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

7th percentile - higher than 7% of all known CVEs

Summary

In the Linux kernel, the usb: dwc3 driver has an issue with the forceRM bit when issuing EndTransfer. On DWC_usb31 v2.00a and v2.10a controllers with forceRM=1, a transfer aborted via ep_dequeue remained active after EndTransfer completion, and a subsequent StartTransfer triggered writes associated with the aborted transfer, causing an SMMU fault because the transfer buffer had already been unmapped. Using forceRM=0 eliminates the issue.

Risk Assessment

Can lead to SMMU faults, data corruption, or system crashes on platforms with DWC_usb31 v2.00a and v2.10a controllers. Affects the integrity of USB operations.

Recommendation

Update the Linux kernel to a version containing the fix that clears forceRM when issuing EndTransfer. Prioritize updates on systems with DWC_usb31 v2.00a/v2.10a controllers.

Related vulnerabilities

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: clear forceRM when issuing EndTransfer The forceRM bit of the DEPCMD register controls the behavior of the EndTransfer command used to stop an active transfer. Older DWC3 programming guide revisions recommended setting forceRM=1 when issuing EndTransfer. Newer programming guide revisions recommend issuing EndTransfer with forceRM cleared. With forceRM=1 on DWC_usb31 v2.00a and v2.10a controllers, a transfer aborted through the ep_dequeue path was observed to remain active after EndTransfer completion. A subsequent StartTransfer issued on the same endpoint triggered writes associated with the aborted transfer. This resulted in an SMMU fault because the transfer buffer had already been unmapped during EndTransfer command-completion cleanup. Using forceRM=0 eliminates the issue. Although older DWC3 programming guide revisions recommended setting forceRM=1, no issues are known from using forceRM=0. Clear forceRM when issuing EndTransfer to provide consistent EndTransfer behavior and align with newer programming guide recommendations.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS