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Release Date:
October 11, 2022

Version:
.NET Framework 3.5 and 4.8

IMPORTANT

This update was originally released in the Security and Quality Rollup that’s dated September 20, 2022.  This update is included in the Security and Quality Rollup that’s dated October 11, 2022.  There is no change to this update with this release on October 11, 2022.  If you have previously installed this update no action is needed.

The September 20, 2022 update for Windows 11 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8. 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

There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

Quality and Reliability Improvements

WPF1

- Addresses issues arising in TreeView (or ListBox/DataGrid with grouping enabled) when changing the underlying collection(s) while also collapsing or expanding TreeView nodes. Scrolling actions, especially "short" actions like LineUp or MouseWheelUp, can result in poor outcomes: hangs, crashes, unexpected scrolling, gaps in the display, etc.

1Windows Presentation Foundation (WPF)

Additional information about this update

The following articles contain additional information about this update as it relates to individual product versions.

  • 5018546 Description of the Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 11 (KB5018546)

Known issues in this update

The September 2022 preview release is listed in Windows Server Update Services
IT Administrators who utilize Windows Server Update Services (WSUS) might notice that this KB is listed among the updates available from WSUS. This listing is an error. Preview updates are generally only available for manual importing via to the Microsoft Update Catalog.

Home users of Windows are unlikely to experience this issue. WSUS is commonly utilized by technology administrators to deploy Microsoft product updates in managed environments.

Please note: In environments where WSUS is configured to auto-approve updates and also auto-decline superseded content, the .NET Framework September 2022 Security and Quality Rollup Update may subsequently be auto-decline and auto-expired from the client view. If this occurs, see the guidance for reinstating declined updates. Then, run an update synchronization within Microsoft Endpoint Configuration Manager, or update management environments. Environments configured to only take security updates should not reflect these symptoms.

Resolution: This issue is now resolved.

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

No

None. These changes will be included in the next security update to this channel. For more information about Windows Update for Business go to the Windows Update for Business website.

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 Products and Classifications as follows:

Product: Windows 11

Classification: 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 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.

How to obtain help and support for this update

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