Yesterday, we released the July 2021 Security and Quality Rollup Updates for .NET Framework.
Contents
Quality and Reliability
This release contains the following quality and reliability improvements.
ClickOnce
Addresses a regression introduced in previous updates. We now honor WinTrust policy setting “Ignore timestamp revocation checks” setting when validating timestamps in ClickOnce manifests.
CLR1
When the process is not under high memory pressure it tends to favor doing BGCs over doing full compacting GCs. This is usually desirable but if the app behavior changes dramatically, it could cause much of the fragmentation in older generations (ie, gen2 and LOH) to be unused. You can collect GC ETW events which tell you how much fragmentation there is in gen2 and LOH and verify if you are in this situation.
Windows Forms
Addresses an issue in Property Grid control to prevent incorrect data read in some scenarios in 64 bit processes.
Addresses an issue where System.Drawing double frees allocated memory when failing to get printer settings.
WPF2
Addresses an issue affecting a DataGrid contained in an outer ScrollViewer.
Addresses a crash due to ElementNotAvailableException in a ListView with custom data-item automation peers.
1 Common Language Runtime (CLR)
2 Windows Presentation Foundation (WPF)
Getting the Update
The Security and Quality Rollup 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 10 21H1
.NET Framework 3.5, 4.8
Catalog
5003537
Windows 10, version 20H2 and Windows Server, version 20H2
.NET Framework 3.5, 4.8
Catalog
5003537
Windows 10 2004 and Windows Server, version 2004
.NET Framework 3.5, 4.8
Catalog
5003537
Windows 10 1909
.NET Framework 3.5, 4.8
Catalog
5003539
Windows 10 1809 (October 2018 Update) and Windows Server 2019
.NET Framework 3.5, 4.7.2
Catalog
5003541
.NET Framework 3.5, 4.8
Catalog
5003538
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
5004238
.NET Framework 4.8
Catalog
5004115
The following table is for earlier Windows and Windows Server versions.
Product Version
Security and Quality Rollup
Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2
.NET Framework 3.5
Catalog
4578953
.NET Framework 4.5.2
Catalog
4578956
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2
Catalog
5004122
.NET Framework 4.8
Catalog
5004118
Windows Server 2012
.NET Framework 3.5
Catalog
4578950
.NET Framework 4.5.2
Catalog
4578954
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2
Catalog
5004121
.NET Framework 4.8
Catalog
5004117
Windows 7 SP1 and Windows Server 2008 R2 SP1
.NET Framework 3.5.1
Catalog
4578952
.NET Framework 4.5.2
Catalog
4578955
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2
Catalog
5004120
.NET Framework 4.8
Catalog
5004116
Windows Server 2008
.NET Framework 2.0, 3.0
Catalog
4578951
.NET Framework 4.5.2
Catalog
4578955
.NET Framework 4.6, 4.6.2
Catalog
5004120
Previous Monthly Rollups
The last few .NET Framework Monthly updates are listed below for your convenience:
.NET Framework June 2021 Cumulative Update Preview
.NET Framework June 2021 Security and Quality Rollup Updates
.NET Framework May 2021 Cumulative Update Preview for Windows 10, versions 2004, 20H2, 21H1
.NET Framework May 2021 Cumulative Update Preview
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