# CVE-2026-46142: net: libwx: fix VF illegal register access

CVE-2026-46142 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-46142, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-46142
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 28, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46142

## 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).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.88-1 | [DEBIAN-CVE-2026-46142](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46142.md) | Jun 24, 2026 |
| Linux | linux Debian 14 | 7.0.7-1 | [DEBIAN-CVE-2026-46142](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46142.md) | Jun 24, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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