Windows Updates Break VPN Access for WSL Users
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Recent Windows 11 security updates, including KB5067036 and KB5072033, are causing VPN networking failures for enterprise users running Windows Subsystem for Linux (WSL). The issue affects users with mirrored mode networking enabled, preventing access to corporate resources. The problem stems from VPN applications' virtual network interfaces failing to respond to Address Resolution Protocol (ARP) requests. This impacts OpenVPN and enterprise VPN solutions like Cisco Secure Client. Microsoft is investigating the issue but has not yet provided a fix or workaround.
Timeline
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15.12.2025 16:34 1 articles · 2h ago
Windows Updates Cause VPN Networking Failures for WSL Users
Recent Windows 11 security updates, including KB5067036 and KB5072033, are causing VPN networking failures for enterprise users running WSL. The issue affects users with mirrored mode networking enabled, preventing access to corporate resources. The problem stems from VPN applications' virtual network interfaces failing to respond to ARP requests. Microsoft is investigating the issue but has not yet provided a fix or workaround.
Show sources
- Microsoft: Recent Windows updates break VPN access for WSL users — www.bleepingcomputer.com — 15.12.2025 16:34
Information Snippets
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The issue affects users who installed KB5067036 (October 2025 non-security update) or subsequent updates, including KB5072033 (Patch Tuesday update).
First reported: 15.12.2025 16:341 source, 1 articleShow sources
- Microsoft: Recent Windows updates break VPN access for WSL users — www.bleepingcomputer.com — 15.12.2025 16:34
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Users experience 'No route to host' errors in WSL environments, even though their Windows host systems can access the same destinations.
First reported: 15.12.2025 16:341 source, 1 articleShow sources
- Microsoft: Recent Windows updates break VPN access for WSL users — www.bleepingcomputer.com — 15.12.2025 16:34
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The problem is caused by VPN applications' virtual network interfaces failing to respond to ARP requests.
First reported: 15.12.2025 16:341 source, 1 articleShow sources
- Microsoft: Recent Windows updates break VPN access for WSL users — www.bleepingcomputer.com — 15.12.2025 16:34
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The issue primarily affects enterprise VPN solutions, including OpenVPN and Cisco Secure Client.
First reported: 15.12.2025 16:341 source, 1 articleShow sources
- Microsoft: Recent Windows updates break VPN access for WSL users — www.bleepingcomputer.com — 15.12.2025 16:34
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Microsoft is investigating the issue but has not provided a timeline for a fix or workaround.
First reported: 15.12.2025 16:341 source, 1 articleShow sources
- Microsoft: Recent Windows updates break VPN access for WSL users — www.bleepingcomputer.com — 15.12.2025 16:34