CVE-2026-90030 - Vulnerability Details

- usb: dwc3: clear forceRM when issuing EndTransfer

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.

Published: 2026-09-16

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The Linux kernel dwc3 USB controller driver contains a use–after–free flaw (CWE‑416) where issuing an EndTransfer command with the forceRM bit set leaves an aborted transfer active. If a subsequent StartTransfer writes to the same buffer after it has been unmapped during EndTransfer cleanup, an SMMU fault is triggered, potentially causing a kernel panic or another system failure.

Affected Systems

Systems running Linux kernels that include the dwc3 EndTransfer logic with forceRM set to 1 are vulnerable, specifically those using the DWC_usb31 v2.00a or v2.10a hardware controllers. All kernel versions prior to the patch that clears forceRM during EndTransfer may be affected.

Risk and Exploitability

The CVSS score of 7.8 indicates high severity, yet the EPSS score is less than 1 % and the vulnerability is not listed in the CISA KEV catalog, reflecting a low likelihood of immediate exploitation. The likely attack vector is an attacker forcing the host to issue EndTransfer with forceRM = 1, such as via a malicious USB device, but the exact conditions and required access are not specified in the source information.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`1e43c86d84fb0503e82a143e017f35421498fc1a`	affected	< 9f1e57c484f9edeaaa5a27a03ed985e98496e81d
`1e43c86d84fb0503e82a143e017f35421498fc1a`	affected	< 0afe5c31612de3d18cc6d16e616da4a48ba1e5a2
`1e43c86d84fb0503e82a143e017f35421498fc1a`	affected	< e01408ee52fe5cb2d0b43f47f359336af2b6c316
`1e43c86d84fb0503e82a143e017f35421498fc1a`	affected	< b58e6200450d350314db0ecda7d6d1bde3281e80
`ab99c4be945724b032cc55e05c6738fe1d84bf70`	affected	—
`6.6.37`	affected	< 6.7

Linux

affected

Version	Status	Constraints
`6.9`	affected	—
`0`	unaffected	< 6.9
`6.12.112`	unaffected	≤ 6.12.*
`6.18.51`	unaffected	≤ 6.18.*
`7.2.5`	unaffected	≤ 7.2.*
`7.3-rc2`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[1e43c86d84fb0503e82a143e017f35421498fc1a,0afe5c31612de3d18cc6d16e616da4a48ba1e5a2)`	affected	code_commit	—
`[1e43c86d84fb0503e82a143e017f35421498fc1a,e01408ee52fe5cb2d0b43f47f359336af2b6c316)`	affected	code_commit	—
`[1e43c86d84fb0503e82a143e017f35421498fc1a,b58e6200450d350314db0ecda7d6d1bde3281e80)`	affected	code_commit	—
`ab99c4be945724b032cc55e05c6738fe1d84bf70`	affected	code_commit	—
`[6.6.37,6.7)`	affected	generic	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`6.9`	affected	generic	—
`[0,6.9)`	unaffected	generic	—
`[6.18.51,6.18.*]`	unaffected	generic	—
`[7.2.5,7.2.*]`	unaffected	generic	—
`[7.3-rc2,*]`	unaffected	generic	—

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Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the latest Linux kernel update that fixes the dwc3 EndTransfer forceRM bug.
If the kernel cannot be updated immediately, reconfigure the driver or firmware to clear the forceRM bit before issuing EndTransfer, following the newer programming guide recommendations.
As a temporary measure, disable or replace the affected USB 3.0 controller, or prevent the use of the EndTransfer command on the implicated endpoint.

Generated by OpenCVE AI on September 18, 2026 at 08:27 UTC.

Tracking

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Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00175.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0afe5c31612de3d18cc6d16e616da4a48ba1e5a2
https://git.kernel.org/stable/c/9f1e57c484f9edeaaa5a27a03ed985e98496e81d
https://git.kernel.org/stable/c/b58e6200450d350314db0ecda7d6d1bde3281e80
https://git.kernel.org/stable/c/e01408ee52fe5cb2d0b43f47f359336af2b6c316

History

Sat, 03 Oct 2026 11:15:00 +0000

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/9f1e57c484f9edeaaa5a27a03ed985e98496e81d

Fri, 18 Sep 2026 08:45:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416

Wed, 16 Sep 2026 14:45:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Wed, 16 Sep 2026 10:45:00 +0000

Type	Values Removed	Values Added
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.
Title		usb: dwc3: clear forceRM when issuing EndTransfer
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0afe5c31612de3d18cc6d16e616da4a48ba1e5a2 https://git.kernel.org/stable/c/b58e6200450d350314db0ecda7d6d1bde3281e80 https://git.kernel.org/stable/c/e01408ee52fe5cb2d0b43f47f359336af2b6c316

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-09-16T10:33:31.801Z

Updated: 2026-10-03T10:57:02.429Z

Reserved: 2026-09-11T19:38:34.782Z

Link: CVE-2026-90030

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-16T11:17:16.070

Modified: 2026-10-03T11:17:46.047

Link: CVE-2026-90030

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-09-18T08:30:06Z

Weaknesses

CWE-416
Use After Free

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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