Bug 2482572 (CVE-2026-46142) - CVE-2026-46142 kernel: net: libwx: fix VF illegal register access
Summary: CVE-2026-46142 kernel: net: libwx: fix VF illegal register access
Keywords:
Status: NEW
Alias: CVE-2026-46142
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-28 11:03 UTC by OSIDB Bzimport
Modified: 2026-05-28 16:50 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-05-28 11:03:52 UTC 
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).
Comment 1 Keith Grant 2026-05-28 16:48:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052820-CVE-2026-46142-52bf@gregkh/T
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