Microsoft have released an update to Windows 10 for Windows Insiders on the Beta and Release Preview Channel (the same update is also available for non Insiders with the release version of 20H2). The update has security fixes and fixes for issues caused by chkdsk /f. Currently the Release Preview Channel and Beta channel are both on the same version of the 20H2 update so the updates are the same for both channels. KB4601319 takes the build to 19042.804.
Here are the fixes:
We fixed a possible elevation of privilege vulnerability in the win32k component.
We fixed an issue that might damage the file system of some devices and prevent them from starting up after running chkdsk /f.
We fixed a security vulnerability by preventing applications that run as a SYSTEM account from printing to “FILE:” ports. To address this issue in the future, make sure your applications or services run as a specific user or service account.
Security updates to the Windows App Platform and Frameworks, Windows Apps, Windows Input and Composition, Windows Cloud Infrastructure, Windows Management, Windows Authentication, Windows Fundamentals, Windows Cryptography, Windows Virtualization, Windows Core Networking, and Windows Hybrid Cloud Networking.