KB5051979: Fixed: Your system might stop responding when it accesses symbolic links

February 11, 2025—KB5051979 (OS Build 20348.3207)

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.

• [Task Manager] Fixed: The CPU index number might be wrong when you set process affinity. This occurs on servers that have two or more non-uniform memory access (NUMA) nodes.
• [GB18030-2022] This update adds support for this amendment.
• [Memory leak] Fixed: Leaks occur when predictive input ideas show.
• [Device Health Attestation] Fixed: When you upgrade from Windows Server 2016, a crucial item is not there. Because of this, service fails.
• [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.
• [Directory enumeration] Fixed: This might fail if a directory has symbolic links that have long target names.
• [Bind Filter Driver] Fixed: Your system might stop responding when it accesses symbolic links.
• [Digital/Analog converter (DAC) (known issue)] Fixed: You might experience issues with USB audio devices. This is more likely when you use a DAC audio driver based on USB 1.0. USB audio devices might stop working, which stops playback.
• [USB cameras] Fixed: Your device does not recognize the camera is on. This issue occurs after you install the January 2025 security update.
• [USB audio device drivers] Fixed: The code 10 error message, “This device cannot start” appears. This occurs when you connect to certain external audio management devices. ​​​​​​​

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.