Security News > 2022 > December > Microsoft fixes Hyper-V VM problem caused by Patch Tuesday

Microsoft has pushed out an emergency fix for a problem in Windows Server caused by patch updates that made it impossible for some organizations to create virtual machines on Hyper-V hosts.
The issue arose after Windows Server 2019 and Windows Server 2022 users installed two updates that were part of this month's Patch Tuesday releases.
The problem arose after users installed the KB5021249 and KB5021237 updates on Windows Server or Azure Stack HCI hosts.
Now organizations can get a standalone package for the OOB updates by searching for the KB update number in the Microsoft Update Catalog and manually import them into Windows Server Update Services, with instructions found here, and Endpoint Configuration Manager.
"You do not need to apply any previous update before installing these cumulative updates," Microsoft wrote.
The Patch Tuesday updates have been causing a few headaches for Windows users.
News URL
https://go.theregister.com/feed/www.theregister.com/2022/12/21/microsoft_fix_hyperv_patch/
Related news
- Microsoft March 2025 Patch Tuesday fixes 7 zero-days, 57 flaws (source)
- Patch Tuesday: Microsoft Fixes 57 Security Flaws – Including Active Zero-Days (source)
- April 2025 Patch Tuesday forecast: More AI security introduced by Microsoft (source)
- Microsoft April 2025 Patch Tuesday fixes exploited zero-day, 134 flaws (source)
- Patch Tuesday: Microsoft Fixes 134 Vulnerabilities, Including 1 Zero-Day (source)
- March 2025 Patch Tuesday forecast: A return to normalcy (source)
- Choose your own Patch Tuesday adventure: Start with six zero day fixes, or six critical flaws (source)
- Week in review: Probing activity on Palo Alto Networks GlobalProtect portals, Patch Tuesday forecast (source)
- April's Patch Tuesday leaves unlucky Windows Hello users unable to login (source)