As part of the October 2020 Update (version 20H2) maintenance schedule, Windows 10 build 19042.662 is now available as update KB4586853 for computers enrolled in the Release Preview Channel and Beta Channel of the Windows Insider Program. This update preview includes a slew of fixes and improvements that Microsoft plans to rollout in the next Patch Tuesday release, during the second week of December.
The update KB4586853 bumps the version number to build 19042.662, and according to the changelog, the update addresses a problem with USB 3.0 hubs, black screen during Windows Virtual Desktop (WVD) sign in, Microsoft Xbox Game Bar app controls failing to appear on the screen, issue with networking traffic, updates not installing correctly, and PIN sign in on the Lock screen. Also, it fixes memory leaks for non-paged pools, PowerShell, and bindflt.sys, among many other fixes.
In addition, build 19042.662 introduces a new Hardware-enforced Stack Protection feature known as shadow stacks on supported hardware. Starting with this update, apps can opt in to use this mode to “harden backward-edge control-flow integrity and prevent return-oriented programming-based attacks.” Also, this update allows the touch keyboard to work in multi-app assigned access mode.
Furthermore, the update KB4586853 addresses problems with Kerberos authentication related to the PerformTicketSignature registry subkey value in CVE-2020-17049, which was a part of the update KB4586781 released on November 10, 2020. (This fix is also available for the stable release of version 20H2.)
Microsoft is listing the complete set of improvements and fixes for Windows 10 build 19042.662 at the Windows Blog.
Download Windows 10 build 19042.662
The preview is available immediately through the Release Preview Channel and Beta Channel, and it will install automatically, but you can always force it from Settings > Update & security > Windows Update, and clicking the Check for updates button.