Win Update KB5022497 Cumulative Update .NET Framework 3.5 and 4.8.1 (22H2)

February 14, 2023-KB5022497 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2​

The February 14, 2023 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

CVE-2023-21808 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in the MSDIA SDK where an untrusted pointer dereference can cause memory corruption, leading to a crash or remove code execution. For more information please see CVE-2023-21808.

CVE-2023-21722 - .NET Framework Denial of Service Vulnerability
This security update addresses a vulnerability where the Visual Studio WMI Setup Provider Installer can be used by a low level, local attacker to corrupt local files that SYSTEM can writ to, leading to a potential denial of service. For more information please see CVE-2023-21722.

Quality and Reliability Improvements

WPF1

- Addresses an issue in propagation of ElementHost controls Visible property to underlying HwndWrapper. - Addresses an issue that restores VirtualizingScrollPanel scrolling behavior for CollectionChange event. - Addresses an issue to ignore Win32LastError when calling GetWindowText and GetWindowTextLength methods. - Addresses Null Reference Exception when ToolTip is visible property is overridden to be always be false.

Networking

- Addresses an issue in the Socket.EndReceiveFrom method that may lead to AccessViolationException in rare scenarios.

1Windows Presentation Foundation (WPF)

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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February 14, 2023-KB5022497 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2 - Microsoft Support

support.microsoft.com

.NET Framework February 2023 Security and Quality Rollup Updates

February 2023 Security and Quality Rollup Updates for .NET Framework

devblogs.microsoft.com