Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 (KB4603003)

Applies to:

Microsoft .NET Framework 3.5 Microsoft .NET Framework 4.5.2 Microsoft .NET Framework 4.6 Microsoft .NET Framework 4.6.1 Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Microsoft .NET Framework 4.8

Important

This update is included in the Security and Quality Rollup that's dated February 9, 2021. Parts of this update were previously released in the rollup that's dated October 13, 2020.

Summary

Security Improvements

This security update addresses a denial of service vulnerability in .NET Framework. For more information please see CVE-2021-24111.

Quality Improvements

For a list of improvements that were released with this update, please see the article links in the Additional Information section of this article.

Important

  • All updates for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 require that the d3dcompiler_47.dll update is installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll, see KB 4019990.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Known issues in this update

There is a known issue with some of the updates to Microsoft .NET Framework 4.6 and higher that released as a part of this update. For details please see the links in the Additional Information section.

Additional information about this update

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

  • 4578950 Description of the Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB4578950)

  • 4578954 Description of the Security and Quality Rollup for .NET Framework 4.5.2 for Windows Server 2012 (KB4578954)

  • 4600957 Description of the Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB4600957)

  • 4601057 Description of the Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB4601057)

Release Channel

Available

Next Step

Windows Update and Microsoft Update

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 Products and Classifications as follows:

Classification: Security Updates

Information about protection and security

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