Bugs in Windows Server Updates

This month’s Patch Tuesday release brought 97 vulnerabilities to light from Microsoft, including patches for Windows Server. These updates, however, contain bugs that have been reported by admins rolling it out.

More specifically, the Windows Server 2012 R2 KB5009624 update, Windows Server 2019 KB5009557 update, and Windows Server 2022 KB5009555 update have been reported to cause issues, including HyperV not running for Server 2012 and VPN issues on Server 2019 and 2022. HyperV not starting on servers can have a significant impact on your organization if critical business functions run on it. Admins are reporting that these issues are only resolved once the updates are rolled back on the system.

What should be done?

These patches do remediate security issues, but their potential impact on operability is significant enough to recommend that you do not update to these patches at this time. As of now, the updates are still available in the Microsoft catalog, so it’s important to scrutinize the list of updates you are pulling in. You can monitor the status of these issues here as Microsoft works to confirm and resolve them.

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