CVE-2026-46091
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USB Request Structure DMA Coherency Bypass in Linux Kernel

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: media: rc: igorplugusb: heed coherency rules In a control request, the USB request structure can be subject to DMA on some HCs. Hence it must obey the rules for DMA coherency. Allocate it separately.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-46091
EUVD
EUVD-2026-32474
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's media subsystem, specifically in the igorplugusb driver. It involves the handling of USB control requests where the USB request structure can be subject to Direct Memory Access (DMA) on some Host Controllers (HCs). The issue arises because the request structure does not properly follow DMA coherency rules, which are necessary to ensure data integrity during DMA operations. The fix involves allocating the USB request structure separately to maintain proper DMA coherency.

Impact Analysis

Improper handling of DMA coherency in USB request structures can lead to data corruption or unexpected behavior in the affected media driver. This could potentially cause system instability, crashes, or incorrect processing of USB control requests. However, specific impacts such as privilege escalation or remote code execution are not detailed in the provided information.

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