SB20260529162 - Improper access control in Linux kernel wangxun libwx driver
Published: May 29, 2026
Security Bulletin ID
SB20260529162
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-46142)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper access to a restricted register in net: libwx when initializing a virtual function device. A local user can initialize a virtual function to cause a denial of service.
The issue is triggered when a virtual function attempts to read the PF-restricted register WX_CFG_PORT_ST, leading to a system hang.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/33c5bb50b9c40e8451e6aec4487a31d794b98d92
- https://git.kernel.org/stable/c/68a007a701bc06fa426507c551ef12514f2e721d
- https://git.kernel.org/stable/c/694de316f607fe2473d52ca0707e3918e72c1562
- https://git.kernel.org/stable/c/d3bd8040497968f6f5470018724ef7b0df92f707
- https://git.kernel.org/stable/c/f6e656f7cea16b638675a2ab7d7e4cf2516c5eb0