Emergency Windows Server Update Resolves Hyper-V VM Freezing and Restart Problems
Microsoft has rolled out an emergency update to fix a critical issue affecting some Hyper-V virtual machines running on Windows Server 2022, which could freeze or reboot unexpectedly.
The problem primarily impacts Azure confidential virtual machines—VMs specifically designed to secure data during processing, not just during storage or transmission.
Figure 1.Hyper-V VM.
To resolve the issue, Microsoft released the out-of-band (OOB) update KB5061906 for Windows Server 2022. This cumulative update replaces all previous updates for the operating system.
According to Microsoft, the update addresses "an issue in the direct send path for a guest physical address (GPA)," which could cause confidential VMs on Hyper-V to intermittently hang or restart, potentially affecting service availability and requiring manual recovery.
Microsoft clarified that the issue is mostly confined to Azure confidential VMs and is unlikely to impact standard Hyper-V deployments, except in limited preview or pre-production environments.
The KB5061906 update is not available via Windows Update and won't install automatically [1]. IT administrators must download and apply it manually using the standalone MSU package from the Microsoft Update Catalog.
Microsoft recommends applying this emergency update if the May 2025 security update (KB5058385) has not yet been installed and your environment includes Windows Server 2022 Hyper-V instances. Organizations unaffected by this specific issue do not need to install the update.
This follows a pattern of emergency fixes. Just last month, Microsoft released urgent updates to fix a problem that prevented Windows containers from launching on Windows Server 2019, 2022, and 2025.
In October 2023, updates for Windows Server 2019 and 2022 caused VM boot failures and “failed to start” errors. Similarly, emergency patches in January and December 2022 addressed issues that blocked the creation and startup of Hyper-V VMs.
Reference:
- https://www.bleepingcomputer.com/news/microsoft/windows-server-emergency-update-fixes-hyper-v-vm-freezes-restart-issues/
Cite this article:
Keerthana S (2025), Emergency Windows Server Update Resolves Hyper-V VM Freezing and Restart Problems, AnaTechMaz, pp.177
Recent Post
-
Six Must-Watch Vendor Platforms
Vendors are integrating networking and security solutions....
-
Wavelet-Based Adversarial Training: A Cybersecurity System Safeguarding Medical Digital Twins from Attacks
A digital twin is a precise virtual replica of a real-world system....
-
Intel Memory Leak Opens Door for Hackers to Steal Data Rapidly
Researchers at ETH Zurich have discovered a critical vulnerability....
-
5G Penetrates Skin Millimeters, But Remains Safe
Despite long-standing public concerns, a new peer-reviewed ....
-
Enhancing Secure Information Sharing in Defence Networks
As digital ecosystems grow more complex and interconnected....
-
UK Bans SIM Farms to Combat Telecom Fraud and Cybercrime
The UK has become the first European country to ban SIM farms as part....
-
Cisco, Juniper, and Extreme Battle for Leadership in Rapidly Growing WLAN Market
Cisco, Juniper Networks, and Extreme Networks are leading the charge in....
-
184 Million Login Credentials Leaked: Researcher’s Shocking Discovery Highlights Online Security Risks
In a digital world where a single login often holds the key to your....
-
Calls to Boycott Microsoft Grow as Employee Emails Flagged for Palestine-Related Terms Amid Internal Protests
Internal reports from Microsoft employees allege that the company....
-
Police Dismantle 300 Servers in Major Ransomware Supply Chain Crackdown
In the latest phase of Operation Endgame, a coordinated....
-
Vodafone expresses strong support for the growing private 5G sector
The private network sector saw a shakeup this week with Amazon Web....
-
Emergency Windows Server Update Resolves Hyper-V VM Freezing and Restart Problems
Microsoft has rolled out an emergency update to fix a critical....
-
Henan Province in China Quietly Imposes Stricter Internet Controls Than the Rest of the Country
Over the past 18 months, internet users in China’s Henan province have....
-
APT41 Malware Exploits Google Calendar for Covert Command-and-Control (C2) Communication
The Chinese state-sponsored threat group APT41 has been observed using....
-
Adidas Issues Warning About Data Breach Following Hack of Customer Service Provider
In a troubling development for one of the world's most recognized sportswear....