Applies to:

Microsoft .NET Framework 4.8

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

CLR1

- In scenarios with both high numbers of assemblies and high numbers of GC heaps, Server GC can encounter serious lock contention during generation 2 GCs.A config switch has been introduced as a workaround.It can either be enabled from a .config file:

<configuration>
  <runtime>
    <GCStaticsNoLock enabled="true"/>
  </runtime>
</configuration>

Or by setting environment variable COMPLUS_GCStaticsNoLockto a non-zero value.  If the config switch is not enabled, behavior is unchanged compared to previous versions.

Winforms

- Addresses an issue where some Windows Forms applications that use ToolStrip controls with ToolStripControlHost, and run under UIA Accessibility Tools, could make Accessibility Tools unresponsive.

- Addresses a regression in the ComboBox item accessible object where Accessibility Tools was not able to distinguish between identical items in the ComboBox and was becoming unresponsive.

1 Common Language Runtime (CLR)

Known issues in this update

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

Additional information about this update

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

  • 5004872 Description of the 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 (KB5004872)

How to obtain and install the update

Before installing this update

Prerequisite:

To apply this update, you must have .NET Framework 4.8 installed.

Install this update

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:

Product:Windows Server 2012

Classification: Updates

Update removal information

To remove this update, use the Programs and Features item in Control Panel.

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update replaces previously released updates 5004230.

File Information

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Presentationframework-systemdata.dll

4.8.4395.0

17,800

26-May-2021

00:23

x86

None

Not applicable

Presentationframework.dll

4.8.4395.0

6,283,640

26-May-2021

00:23

x86

None

Not applicable

Reachframework.dll

4.8.4110.0

677,656

04-Dec-2019

02:55

x86

None

Not applicable

Smdiagnostics.dll

4.8.4261.0

66,328

02-Sep-2020

21:05

x86

None

Not applicable

Smsvchost.exe

4.8.4121.0

139,056

07-Dec-2019

06:03

x86

None

Not applicable

System.activities.presentation.dll

4.8.4150.0

2,127,128

09-Jan-2020

19:46

x86

None

Not applicable

System.activities.dll

4.8.4261.0

1,526,528

02-Sep-2020

21:05

x86

None

Not applicable

System.configuration.dll

4.8.4190.0

421,536

05-Jun-2020

05:04

x86

None

Not applicable

System.core.dll

4.8.4395.0

1,549,080

26-May-2021

00:23

x86

None

Not applicable

System.deployment.dll

4.8.4290.0

1,593,624

30-Sep-2020

01:40

x86

None

Not applicable

System.drawing.design.dll

4.8.4210.0

125,192

30-Jun-2020

01:55

x86

None

Not applicable

System.drawing.dll

4.8.4395.0

595,728

26-May-2021

00:23

x86

None

Not applicable

System.identitymodel.services.dll

4.8.4261.0

191,352

02-Sep-2020

21:05

x86

None

Not applicable

System.identitymodel.dll

4.8.4261.0

1,086,744

02-Sep-2020

21:05

x86

None

Not applicable

System.net.sockets.dll

4.8.4121.0

30,360

07-Dec-2019

06:03

x86

None

Not applicable

System.runtime.serialization.dll

4.8.4261.0

1,047,312

02-Sep-2020

21:05

x86

None

Not applicable

System.security.dll

4.8.4261.0

320,280

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.activities.dll

4.8.4261.0

555,384

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.channels.dll

4.8.4261.0

150,904

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.discovery.dll

4.8.4261.0

301,432

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.internals.dll

4.8.4261.0

246,528

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.washosting.dll

4.8.4261.0

33,144

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.web.dll

4.8.4261.0

321,792

02-Sep-2020

21:05

x86

None

Not applicable

System.servicemodel.dll

4.8.4261.0

6,383,896

02-Sep-2020

21:05

x86

None

Not applicable

System.speech.dll

4.8.4210.0

676,736

30-Jun-2020

01:55

x86

SPE

MSIL_SYSTEM.SP

System.web.applicationservices.dll

4.8.4330.0

63,768

05-Jan-2021

01:30

x86

None

Not applicable

System.web.extensions.dll

4.8.4330.0

1,842,448

05-Jan-2021

01:30

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.8.4395.0

743,824

26-May-2021

00:23

x86

None

Not applicable

System.windows.forms.datavisualization.dll

4.8.4210.0

1,712,512

30-Jun-2020

01:55

x86

None

Not applicable

System.windows.forms.dll

4.8.4410.0

5,918,488

26-Jun-2021

01:40

x86

None

Not applicable

System.workflow.activities.dll

4.8.4110.0

1,051,112

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.componentmodel.dll

4.8.4110.0

1,557,272

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.runtime.dll

4.8.4110.0

503,064

04-Dec-2019

02:55

x86

None

Not applicable

System.xaml.dll

4.8.4395.0

632,104

26-May-2021

00:23

x86

None

Not applicable

System.dll

4.8.4380.0

3,554,584

30-Apr-2021

09:50

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.8.4395.0

354,176

26-May-2021

00:23

x86

None

Not applicable

Uiautomationclient.dll

4.8.4395.0

170,872

26-May-2021

00:23

x86

None

Not applicable

Uiautomationprovider.dll

4.8.4395.0

41,848

26-May-2021

00:23

x86

None

Not applicable

Uiautomationtypes.dll

4.8.4395.0

215,928

26-May-2021

00:23

x86

None

Not applicable

Windowsbase.dll

4.8.4395.0

1,298,808

26-May-2021

00:23

x86

None

Not applicable

Windowsformsintegration.dll

4.8.4150.0

105,240

09-Jan-2020

19:46

x86

None

Not applicable

Mscorlib.dll

4.8.4410.0

5,670,776

26-Jun-2021

01:40

x86

None

Not applicable

Normidna.nlp

Not applicable

59,342

25-Jun-2019

22:46

Not applicable

None

Not applicable

Normnfc.nlp

Not applicable

47,076

25-Jun-2019

22:46

Not applicable

None

Not applicable

Normnfd.nlp

Not applicable

40,566

25-Jun-2019

22:46

Not applicable

None

Not applicable

Normnfkc.nlp

Not applicable

67,808

25-Jun-2019

22:46

Not applicable

None

Not applicable

Normnfkd.nlp

Not applicable

61,718

25-Jun-2019

22:46

Not applicable

None

Not applicable

Aspnet_perf.dll

4.8.4330.0

36,232

05-Jan-2021

01:30

x86

SPN

X86_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

04-Jan-2021

23:56

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

05-Jan-2021

01:31

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_wp.exe

4.8.4330.0

39,824

05-Jan-2021

01:30

x86

SPN

X86_NETFX4-ASP

Clrjit.dll

4.8.4410.0

554,888

26-Jun-2021

01:40

x86

None

Not applicable

Clr.dll

4.8.4410.0

8,040,328

26-Jun-2021

01:40

x86

None

Not applicable

Dfdll.dll

4.8.4290.0

178,040

30-Sep-2020

01:40

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

30-Jan-2021

02:50

Not applicable

SPA

X86_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

30-Jan-2021

02:50

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

30-Jan-2021

02:50

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

30-Jan-2021

02:50

Not applicable

None

Not applicable

Mscordacwks.dll

4.8.4410.0

1,307,512

26-Jun-2021

01:40

x86

None

Not applicable

Mscordbi.dll

4.8.4410.0

1,188,728

26-Jun-2021

01:40

x86

None

Not applicable

Mscoreei.dll

4.8.4180.0

581,920

26-Mar-2020

23:11

x86

None

Not applicable

Mscorsvc.dll

4.8.4330.0

454,024

05-Jan-2021

01:30

x86

None

Not applicable

Mscorsvw.exe

4.8.4330.0

125,872

05-Jan-2021

01:30

x86

None

Not applicable

Ngentask.exe

4.8.4330.0

79,824

05-Jan-2021

01:30

x86

None

Not applicable

Ngen.exe

4.8.4330.0

144,344

05-Jan-2021

01:30

x86

None

Not applicable

Penimc.dll

14.8.4395.0

11,656

26-May-2021

00:23

x86

None

Not applicable

Penimc2_v0400.dll

4.8.4395.0

99,704

26-May-2021

00:23

x86

None

Not applicable

Penimc_v0400.dll

4.8.4395.0

18,296

26-May-2021

00:23

x86

None

Not applicable

Peverify.dll

4.8.4410.0

182,648

26-Jun-2021

01:40

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.8.4395.0

77,704

26-May-2021

00:23

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.8.4395.0

233,848

26-May-2021

00:23

x86

None

Not applicable

Presentationnative_v0400.dll

4.8.4395.0

923,000

26-May-2021

00:23

x86

None

Not applicable

Servicemodel.mof

Not applicable

88,383

08-Nov-2019

23:28

Not applicable

None

Not applicable

Servicemodel.mof.uninstall

Not applicable

896

08-Nov-2019

23:28

Not applicable

None

Not applicable

Servicemonikersupport.dll

4.8.4261.0

24,456

02-Sep-2020

21:05

x86

None

Not applicable

_smsvchostperfcounters.h

Not applicable

702

06-Dec-2019

22:20

Not applicable

None

Not applicable

_smsvchostperfcounters.ini

Not applicable

133,894

07-Dec-2019

06:04

Not applicable

None

Not applicable

_smsvchostperfcounters_d.ini

Not applicable

39

08-Nov-2019

03:11

Not applicable

None

Not applicable

Smsvchost.exe.config

Not applicable

2,262

25-Jul-2019

21:42

Not applicable

None

Not applicable

Sos.dll

4.8.4410.0

767,352

26-Jun-2021

01:40

x86

None

Not applicable

System.core.dll

4.8.4395.0

1,549,080

26-May-2021

00:23

x86

None

Not applicable

System.web.extensions.dll

4.8.4330.0

1,842,448

05-Jan-2021

01:30

x86

None

Not applicable

System.windows.forms.datavisualization.dll

4.8.4210.0

1,712,512

30-Jun-2020

01:55

x86

None

Not applicable

Webengine4.dll

4.8.4330.0

564,616

05-Jan-2021

01:30

x86

None

Not applicable

Webengine.dll

4.8.4330.0

19,328

05-Jan-2021

01:30

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.8.4110.0

89,368

04-Dec-2019

02:55

x86

None

Not applicable

Wpfgfx_v0400.dll

4.8.4395.0

1,618,816

26-May-2021

00:23

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

30-Jan-2021

02:50

Not applicable

None

Not applicable

Globalsansserif.compositefont

Not applicable

26,489

30-Jan-2021

02:50

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

30-Jan-2021

02:50

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

30-Jan-2021

02:50

Not applicable

None

Not applicable

Presentationcore.dll

4.8.4395.0

3,674,496

26-May-2021

00:23

x86

None

Not applicable

System.data.dll

4.8.4290.0

3,476,360

30-Sep-2020

01:40

x86

None

Not applicable

System.printing.dll

4.8.4110.0

399,640

04-Dec-2019

02:55

x86

None

Not applicable

System.web.dll

4.8.4330.0

5,410,184

05-Jan-2021

01:30

x86

None

Not applicable

Information about protection and security

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