CVE-2026-90030 | BDVDB-2026-375310 Detail
LinuxLinux
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.
Weaknesses#
No weakness recorded in the source data.
References#
- https://git.kernel.org/stable/c/7a50e138fa28e5ba76b11af66ed41cc300c0f2be
- https://git.kernel.org/stable/c/9f1e57c484f9edeaaa5a27a03ed985e98496e81d
- https://git.kernel.org/stable/c/0afe5c31612de3d18cc6d16e616da4a48ba1e5a2
- https://git.kernel.org/stable/c/e01408ee52fe5cb2d0b43f47f359336af2b6c316
- https://git.kernel.org/stable/c/b58e6200450d350314db0ecda7d6d1bde3281e80
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.