Windows 11 391 Published by

Microsoft has published KB5033375 (OS Builds 22621.2861 and 22631.2861) for Windows 11 22H2 and Windows 11 23H.



December 12, 2023—KB5033375 (OS Builds 22621.2861 and 22631.2861) - Microsoft Support

Highlights

  • This update addresses security issues for your Windows operating system.

 Improvements

Note: To view the list of addressed issues, click or tap the OS name to expand the collapsible section.

Windows 11, version 23H2

Important: Use EKB  KB5027397 to update to Windows 11, version 23H2.

This security update includes quality improvements. Key changes include: 

  • This build includes all the improvements in Windows 11, version 22H2.

  • No additional issues are documented for this release.

Windows 11, version 22H2

This security update includes improvements that were a part of update  KB5032288 (released December 4, 2023). When you install this KB:  

  • 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 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  December 2023 Security Updates.


December 12, 2023—KB5033375 (OS Builds 22621.2861 and 22631.2861) - Microsoft Support