CVE-2026-46142
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).
Affected versions
Linux kernel versions
6.6.117,
6.12.58,
6.17.8,
6.18
and later are affected. Fixed in
6.6.140,
6.12.88,
6.18.30,
7.0.7,
7.1-rc3
and their respective stable series.
References
The following references provide additional information about CVE-2026-46142 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/33c5bb50b9c40e8451e6aec4487a31d794b98d92
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PatchKernel patch commithttps://git.kernel.org/stable/c/68a007a701bc06fa426507c551ef12514f2e721d
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PatchKernel patch commithttps://git.kernel.org/stable/c/694de316f607fe2473d52ca0707e3918e72c1562
Frequently asked questions
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What is CVE-2026-46142?
CVE-2026-46142 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.6.117 onward and has been patched in 6.6.140, 6.12.88, 6.18.30 and others. CVE-2026-46142 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46142?
Yes — CVE-2026-46142 has been patched. Fixed versions include 6.6.140, 6.12.88, 6.18.30 and others. If you are running Linux kernel 6.6.117 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46142 actively exploited?
No — CVE-2026-46142 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.