February 15th, 2022

.NET Framework February 2022 Cumulative Update Preview

Tara Overfield
Senior Software Engineer

Today, we are releasing the February 2022 Cumulative Update Preview for .NET Framework.

Security

The February Security and Quality Rollup Update does not contain any new security fixes. See January 2022 Security and Quality Rollup for the latest security updates.

Quality and Reliability

This release contains the following quality and reliability improvements.

NET Libraries
  • 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 a timeout.
Winforms
  • Addresses a leak of IRawElementProviderSimple objects which was introduced in .NET Framework 4.8. This is an opt-in fix, add the following compatibility switch to the app.config file in order to dispose the accessible objects: <Runtime> <!-- AppContextSwitchOverrides values are in the form of 'key1=true|false;key2=true|false --> <AppContextSwitchOverrides value="Switch.System.Windows.Forms.DisconnectUiaProvidersOnWmDestroy=true"/> <Runtime> Note: When the accessibility server application opts into this fix, the accessibility client will receive errors when accessing the disconnected provider. This is expected because the corresponding control window is destroyed. Previous behavior where the provider was returning information for destroyed controls was incorrect.

Getting the Update

The Cumulative Update Preview is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.

Microsoft Update Catalog

You can get the update via the Microsoft Update Catalog. For Windows 10, NET Framework 4.8 updates are available via Windows Update, Windows Server Update Services, Microsoft Update Catalog. Updates for other versions of .NET Framework are part of the Windows 10 Monthly Cumulative Update.

**Note**: Customers that rely on Windows Update and Windows Server Update Services will automatically receive the .NET Framework version-specific updates. Advanced system administrators can also take use of the below direct Microsoft Update Catalog download links to .NET Framework-specific updates. Before applying these updates, please ensure that you carefully review the .NET Framework version applicability, to ensure that you only install updates on systems where they apply.

The following table is for Windows 10 and Windows Server 2016+ versions.

Product Version Cumulative Update
Windows 11
.NET Framework 3.5, 4.8 Catalog 5010474
Microsoft server operating systems version 21H2
.NET Framework 3.5, 4.8 Catalog 5010475
Windows 10 21H2
.NET Framework 3.5, 4.8 Catalog 5010472
Windows 10 21H1
.NET Framework 3.5, 4.8 Catalog 5010472
Windows 10, version 20H2 and Windows Server, version 20H2
.NET Framework 3.5, 4.8 Catalog 5010472
Windows 10 1809 (October 2018 Update) and Windows Server 2019 5011267
.NET Framework 3.5, 4.7.2 Catalog 5009472
.NET Framework 3.5, 4.8 Catalog 5010473

 

Previous Monthly Rollups

The last few .NET Framework Monthly updates are listed below for your convenience:

Author

Tara Overfield
Senior Software Engineer

Tara is a Software Engineer on the .NET team. She works on releasing .NET Framework updates.

1 comment

Discussion is closed. Login to edit/delete existing comments.

  • Dean Jackson

    It’s very frustrating that you keep calling these “Previews” (and they’re listed as Preview in Windows updates), and yet Windows update auto-installs them. If it’s truly a preview and a there will be a later update coming that’s the real version, Windows update should not auto-install it. If it’s the real version and no later one is coming, then don’t call it a Preview.