Win Update KB5020880 Cumulative Update .NET Framework 3.5 and 4.8.1 (22H2) - Dec. 13

December 13, 2022 - KB5020880 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2​

The December 13, 2022 update for Windows 11, version 22H2 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.

Summary​

Security Improvements

This security update addresses a vulnerability where restricted mode is triggered for the parsing of XPS files, preventing gadget chains which could allow remote code execution on an affected system. For more information please see CVE-2022-41089.

Quality and Reliability Improvements

There are no new Quality and Reliability Improvements in this update.

Known issues in this update​

Symptom	After installing this update, WPF apps may have a change in behavior. For more information about this issue, see KB5022083
Workaround	To mitigate this issue, see KB5022083.

How to get this update​

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.
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 as follows: Product: Windows 11, version 22H2 Classification: Security Updates

File information

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

Prerequisites​

To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.

Restart requirement​

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

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December 13, 2022-KB5020880 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2 - Microsoft Support

support.microsoft.com

.NET Framework December 2022 Security and Quality Rollup Updates - .NET Blog

December 2022 Security and Quality Rollup Updates for .NET Framework

devblogs.microsoft.com