December 10, 2024—Hotpatch public preview KB5048794 (OS Build 26100.2528)

Improvements and fixes

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.

• This update makes miscellaneous security improvements to internal OS functionality. No additional issues were documented for this release.

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

How to get this update 

Before you install this update 

Microsoft now combines the latest servicing stack update (SSU) for your operating system with the hotpatch update. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

If you are using Windows Update, the latest SSU will be installed with this update.

Prerequisite

You must set the registry key listed below on Windows ARM based devices. This ensures that those devices are fully secure when you install hotpatch updates. This key stops the OS from loading Compiled Hybrid Portable Executable (CHPE) binaries.

Key: HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management

DWORD: HotPatchRestrictions=1

You must restart the computer after you set this registry key. Once set, you do not need to set it again because it will persist.

Install this update

To install this update, use one of the following Windows and Microsoft release channels.

File information

For a list of the files that are in this update, download the file information for cumulative update 5048794.

For a list of the files that are in the servicing stack update, download the file information for the SSU (KB5049685) - version 26100.2592.