.NET Framework February 2024 Security and Quality Rollup Updates

Salini Agarwal

Yesterday, we released the February 2024 Security and Quality Rollup Updates for .NET Framework.

Security

The February Security and Quality Rollup Update does not contain any new security fixes. See January 2024 Security and Quality Rollup for the latest security updates.

Quality and Reliability

This release contains the following quality and reliability improvements.

ASP.NET
  • Addresses an issue with “System.ArgumentException: Illegal characters in path” in some ASP.Net MVC requests.
.NET Libraries
  • Addresses an issue where version of the OSS zlib library is out of date.

Getting the Update

The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog. The Security Only Update is available via 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
Microsoft server operating system, version 23H2
.NET Framework 3.5, 4.8.1 Catalog 5034626
Windows 11, version 22H2 and Windows 11, version 23H2
.NET Framework 3.5, 4.8.1 Catalog 5034467
Windows 11, version 21H2 5034686
.NET Framework 3.5, 4.8 Catalog 5034625
.NET Framework 3.5, 4.8.1 Catalog 5034612
Microsoft server operating system, version 22H2 5034923
.NET Framework 3.5, 4.8 Catalog 5034613
.NET Framework 3.5, 4.8.1 Catalog 5034611
Microsoft server operating system version 21H2 5034682
.NET Framework 3.5, 4.8 Catalog 5034613
.NET Framework 3.5, 4.8.1 Catalog 5034611
Windows 10, version 22H2 5034685
.NET Framework 3.5, 4.8 Catalog 5034468
.NET Framework 3.5, 4.8.1 Catalog 5034466
Windows 10, version 21H2 5034684
.NET Framework 3.5, 4.8 Catalog 5034468
.NET Framework 3.5, 4.8.1 Catalog 5034466
Windows 10 1809 (October 2018 Update) and Windows Server 2019 5034683
.NET Framework 3.5, 4.7.2 Catalog 5034619
.NET Framework 3.5, 4.8 Catalog 5034624
Windows 10 1607 (Anniversary Update) and Windows Server 2016
.NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 5034767
.NET Framework 4.8 Catalog 5034614

The following table is for earlier Windows and Windows Server versions.

Product Version Security and Quality Rollup
Windows Server 2008 5034690
.NET Framework 2.0, 3.0 Catalog 5033898
.NET Framework 3.5 Catalog 5034008
.NET Framework 4.6.2 Catalog 5034620
Windows Server 2008 R2 5034687
.NET Framework 3.5.1 Catalog 5033899
.NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 5034620
.NET Framework 4.8 Catalog 5034615
Windows Server 2012 R2 5034689
.NET Framework 3.5 Catalog 5033900
.NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 5034622
.NET Framework 4.8 Catalog 5034617
Windows Server 2012 5034688
.NET Framework 3.5 Catalog 5033897
.NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 5034621
.NET Framework 4.8 Catalog 5034616

The operating system row lists a KB which will be used for update offering purposes. When the operating system KB is offered, the applicability logic will determine the specific .NET Framework update(s) will be installed. Updates for individual .NET Framework versions will be installed based on the version of .NET Framework that is already present on the device. Because of this the operating system KB is not expected to be listed as installed updates on the device. The expected update to be installed are the .NET Framework specific version updates listed in the table above.

 

Previous Monthly Rollups

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

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