KB5049984: Fixed, A Windows guest machine fails to start u
January 14, 2025—KB5049984 (OS Build 25398.1369)
Improvements
This security update includes quality improvements. Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.
- [Virtual machine (VM)] Fixed: A Windows guest machine fails to start up. This occurs when you turn on nested virtualization on a host that supports AVX10.
- [Windows Kernel Vulnerable Driver Blocklist file (DriverSiPolicy.p7b)] This update adds to the list of drivers that are at risk for Bring Your Own Vulnerable Driver (BYOVD) attacks.
For more information about security vulnerabilities, please refer to the Security Update Guide and the January 2025 Security Updates.