CVE-2026-90030

usb: dwc3: clear forceRM when issuing EndTransfer

State: Published
Severity: 7.8 High
Published: Sep 16, 2026
Updated: Oct 21, 2026
Reserved: Sep 11, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ab99c4be945724b032cc55e05c6738fe1d84bf70 to before 7a50e138fa28e5ba76b11af66ed41cc300c0f2beAffected 1e43c86d84fb0503e82a143e017f35421498fc1a to before 9f1e57c484f9edeaaa5a27a03ed985e98496e81dAffected 1e43c86d84fb0503e82a143e017f35421498fc1a to before 0afe5c31612de3d18cc6d16e616da4a48ba1e5a2Affected 1e43c86d84fb0503e82a143e017f35421498fc1a to before e01408ee52fe5cb2d0b43f47f359336af2b6c316Affected 1e43c86d84fb0503e82a143e017f35421498fc1a to before b58e6200450d350314db0ecda7d6d1bde3281e80Affected 6.6.37 to before 6.6.160Affected
LinuxLinux	6.9Affected before 6.9Not affected 6.6.160 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.51 through 6.18.Not affected 7.2.5 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

ab99c4be945724b032cc55e05c6738fe1d84bf70 to before 7a50e138fa28e5ba76b11af66ed41cc300c0f2beAffected
1e43c86d84fb0503e82a143e017f35421498fc1a to before 9f1e57c484f9edeaaa5a27a03ed985e98496e81dAffected
1e43c86d84fb0503e82a143e017f35421498fc1a to before 0afe5c31612de3d18cc6d16e616da4a48ba1e5a2Affected
1e43c86d84fb0503e82a143e017f35421498fc1a to before e01408ee52fe5cb2d0b43f47f359336af2b6c316Affected
1e43c86d84fb0503e82a143e017f35421498fc1a to before b58e6200450d350314db0ecda7d6d1bde3281e80Affected
6.6.37 to before 6.6.160Affected

LinuxLinux

6.9Affected
before 6.9Not affected
6.6.160 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.51 through 6.18.*Not affected
7.2.5 through 7.2.*Not affected
7.3 and laterNot affected

References

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