A fix has been provided for VMs affected by Microsoft’s Patch Tuesday update


An emergency update has been released by VMware for an issue affecting the booting of Windows Server 2022 VMs on vSphere ESXi servers.

The issue arises after the installation of the last Patch Tuesday update, KB5022842.

Windows Server 2022 VMs running on the VMware ESXi 6.7 U2/U3 and 7.0x versions that have Secure Boot enabled were found to fail to boot.

VMware ascertains that the flaw lies in the new kind of digital signature on the EFI bootloader that the Windows update package provides. This new kind of digital signature is incorrectly rejected by the UEFI Secure Boot, which may result in the VMs failing to detect a bootable operating system and therefore failing to boot.

The fix:

VMware has released ESXi 7.0 Update 3k, which must be installed in order to correct or prevent the issue.

This update fixes the problem and allows admins to successfully boot the servers that were negatively affected by Microsoft’s patch.

Microsoft Server 2022 VMs that have not yet received the Microsoft Patch Tuesday update can be updated with VMware’s ESXi 7.0 Update 3k prior to receiving the KB5022842 update in order to avoid the booting issue altogether.

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VMware Emergency Update