CVE-2026-46142
Received Received - Intake
Linux Kernel Illegal Register Access in net: libwx

Publication date: 2026-05-28

Last updated on: 2026-05-28

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: libwx: fix VF illegal register access Register WX_CFG_PORT_ST is a PF restricted register. When a VF is initialized, attempting to read this register triggers an illegal register access, which lead to a system hang. When the device is VF, the bus function ID can be obtained directly from the PCI_FUNC(pdev->devfn).
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Meta Information
Published
2026-05-28
Last Modified
2026-05-28
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46142
EUVD
EUVD-2026-32769
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's network library (libwx) related to Virtual Functions (VF). Specifically, the issue involves an illegal access attempt to a restricted register named WX_CFG_PORT_ST during VF initialization. Since this register is restricted to Physical Functions (PF), reading it from a VF causes an illegal register access that results in the system hanging.

Impact Analysis

The impact of this vulnerability is that when a Virtual Function (VF) tries to read the restricted WX_CFG_PORT_ST register, it causes an illegal register access which leads to a system hang. This means that affected systems could experience crashes or become unresponsive, potentially disrupting normal operations.

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