Windows 11 KB5022303, KB5022287 cumulative update released

Microsoft released Windows 11 KB5022303, KB5022287 cumulative upgrades for version 22H2 and 21H2 in order to address security flaws and fix performance problems.

KB5022303 & KB5022287 must be installed as cumulative Windows updates. They contain the to fix vulnerabilities found in prior months.

This update includes an exploited vulnerability, CVE-202321674. It was used to attack threat actors/malware SYSTEM privileges. Priority updates are available.

Windows 11 users are able to install the current update today by visiting Start> Setting > WindowsUpdate and clicking on “Check for Updates.”

Windows 11 KB5021255 cumulative update

Source: BleepingComputer

Windows 11 users have the option to manually download the update using the .

What is new with the Windows 11 KB5022303 or KB5022287 update?

Today’s non-security upgrade will make Windows 11 22H2 have their build numbers changed to 22621.1105 and 21H2 to 222000.1455.

These cumulative updates were not available for preview in December 2022 because of the holiday. They only fix security flaws and some bugs.

These bugs have been fixed for Windows 11 22H2 as well Windows 11 21H2.

  • Microsoft has fixed an LSM (Local Session Manager) bug which could have allowed users without admin rights to use functions that only admins can.

  • Microsoft fixed a bug in that broke ODBC databases connections or displayed errors.

Blue screen crashes caused by Windows 11 21H2 bug have been fixed.

Microsoft has two issues with Windows 11 22H2 which are still unresolved.

Problems include , and large multiple gigabytes (GB) files compared to SMB.

Future updates will address these bugs.