Microsoft has released Windows 11 Cumulative Updates KB5022303 and KB5022287 for versions 22H2 and 21H2 to fix security vulnerabilities and resolve bugs and performance issues.

KB5022303 and KB5022287 are mandatory Windows cumulative updates because they contain the January 2023 Patch Tuesday Security Updates for vulnerabilities discovered in previous months.

These updates include an actively exploited vulnerability identified as CVE-2023-21674 that has been used in attacks to give threat actors/malware SYSTEM privileges, making this a priority update.

Windows 11 users can install today’s update by going to Beginning > Settings > Windows Update and clicking on ‘Check for updates.’

Windows 11 users can also manually download and install the update from the Microsoft Update Catalog.

What’s New in Windows 11 Updates KB5022303 and KB5022287

After installing today’s non-security update, Windows 11 22H2 (KB5022303) will have its build number replaced by 22621.1105and 21H2 (KB5022287) will be replaced by 22000.1455.

As there was no preview updates in December 2022 Due to the holidays, these cumulative updates only fixed security vulnerabilities and a limited number of bugs.

For Windows 11 22H2 and Windows 11 21H2, the following bugs have been fixed:

• Microsoft fixed a Local Session Manager (LSM) bug that could allow users who do not have administrator rights to perform functions that only an administrator can.

• Microsoft also fixed a bug that breaks ODBC database connections or displays errors.

Windows 11 21H2 update fixes an additional bug that plagued users with blue screen crashes:

Microsoft is aware of two ongoing issues for Windows 11 22H2 that have not been resolved in this update.

The issues are provisioning packages not working as expected and copying large files of several gigabytes (GB) takes longer than expected on SMEs.

These bugs will be fixed in future updates.