UPDATE 8/26: KB5016592 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

August 9, 2022 - KB5015730 Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2

The August 9, 2022 update for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 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 an issue where invoking a synchronization Wait on the UI thread can lead to a render-thread failure, due to unexpected re-entrancy.
Networking	- Addresses an issue when Ssl negotiation can hang indefinitely when client certificates are used when TLS 1.3 is negotiated. Before the change renegotiation (PostHandshakeAuthentiction) would fail and SslStream or HttpWebRequest would observe timeout. Possible workaround is disabling TLS 1.3 either via Switch.System.Net.DontEnableTls13 AppContext or via OS registry.

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.

• 5015730 Description of the Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 (KB5015730)

Known issues in this update

Microsoft is not currently aware of any issues in this update.

How to get this update

Install this update

Release Channel	Available	Next Step
Windows Update and Microsoft Update	Yes	To download and install this update, go to Settings > Update & Security > Windows Update, and then select Check for updates.
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)	No	You can import this update into WSUS manually via 5015730. See the Microsoft Update Catalog for instructions.

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.

Source:

• https://support.microsoft.com/en-us/...b-38a2adc05738
• https://devblogs.microsoft.com/dotne...ollup-updates/

Direct download links for KB5015730 MSU file from Microsoft Update Catalog:

Download KB5015730 MSU for Windows 10 v20H2, v21H1, and v21H2 32-bit (x86) - 43.0 MB

Download KB5015730 MSU for Windows 10 v20H2, v21H1, and v21H2 64-bit (x64) - 67.1 MB

Download KB5015730 MSU for Windows 10 v20H2, v21H1, and v21H2 ARM64 - 43.0 MB

Posted By: Brink
26 Jul 2022