KB5027231 Windows 11 Cumulative Update Build 22621.1848 (22H2)

June 13, 2023 – KB5027231 (OS Build 22621.1848)

Highlights

This update addresses security issues for your Windows operating system.

Improvements

This security update includes improvements that were a part of update KB5026446 (released May 24, 2023). When you install this KB:

This update addresses a known issue that affects 32-bit apps that are large address aware and use the CopyFile API. You might have issues when you save, copy, or attach files. If you use some commercial or enterprise security software that uses extended file attributes, this issue will likely affect you. For Microsoft Office apps, this issue only affects the 32-bit versions. You might receive the error, “Document not saved.”
This update addresses a compatibility issue. The issue occurs because of unsupported use of the registry.
This update addresses an issue that affects the Windows Kernel. This issue is related to CVE-2023-32019. To learn more, see KB5028407.

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

For more information about security vulnerabilities, please refer to the Security Update Guide website and the June 2023 Security Updates.

Windows 11 servicing stack update – 22621.1771

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

How to get this update

Before installing this update

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

Install this update

Release Channel	Available	Next Step
Windows Update and Microsoft Update	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Windows Update for Business	Yes	None. This update will be downloaded and installed automatically from Windows Update in accordance with configured policies.
Microsoft Update Catalog	Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)	Yes	This update will automatically sync with WSUS if you configure Products and Classifications as follows: Product: Windows 11 Classification: Security Updates

If you want to remove the LCU

To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.

Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5027231.

For a list of the files that are provided in the servicing stack update, download the file information for the SSU – version 22621.1771.