Windows Server fixes critical hyper-V problems with emergency update
When virtual machines suddenly give up the mind, this is a nightmare for administrators. Exactly this situation occurred in Windows Server 2022 with Hyper-V-and Microsoft had to react with an emergency update.
Emergency patch saves hanging Windows server
After the last patch-day, heaped problems with Azure VMS occurred, which suddenly rose and restarted without warning. According to the Windows Release-Health dashboard A solution has recently been available.
The error in detail
The culprit hid in the direct broadcast path for physical guest address (GPA). Here a bug led to the fact that confidential virtual machines under Hyper-V no longer reacted or restarted completely unexpectedly. Microsoft admits that this “impairs the availability and requires manual intervention” – a diplomatic description for serious problems that could put entire networks out of action.
Update KB5061906 brings the solution
Microsoft has with the cumulative Out-of-band update KB5061906 Reacts. This replaces all previous updates for Windows Server 2022 and should fix the problems. However, there is a catch: the update is not automatically installed and is not available via Windows Update.
Administrators must now become active themselves and the independent MSU package from the Download Microsoft update catalog. Microsoft recommends this manual installation, especially if the Windows security update from May 2025 (KB5058385) has not yet been recorded and/or the IT environment Windows Server 2022 devices with Hyper-V.
Release notes
This non -safety -relevant update includes quality improvements. If you install this update:
- Hyper-V platform-resolved: A problem in the direct transmission path for a physical guest address (GPA), in which confidential virtual computers that are executed on Hyper-V with Windows Server 2022 are no longer reacted or restarted unexpectedly, which affects the availability and requires manual interventions. This problem primarily affects confidential Azure VMS.
- Maintenance stacked update for Windows Server 2022 (KB5058531): This update contains qualitative improvements at the maintenance stack, which is the component that installs Windows updates. SSU (Servicing Stack Updates) ensure that you have a robust and reliable maintenance stack so that your devices can receive and install Microsoft updates. You can find more information about SSUS by simplifying the local provision of maintenance stacking dates.
If you operate Windows Server 2022 with Hyper-V, you should check your own environment and manually install the KB5061906 update.
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