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
2026-05-28
AI Q&A
2026-05-28
EPSS Evaluated
N/A
NVD
CVE-2026-46142
EUVD
EUVD-2026-32769
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

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.


How can this vulnerability impact me? :

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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