November 12, 2024-KB5045935 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2 and Windows 11, version 23H2
Applies To
.NETRevised July 8, 2025: Updated 'How to get this update' section.Â
Revised December 6, 2024: Update to adjust the improvements from the security improvements section to the quality and reliability improvements section.Â
IMPORTANT
This update was originally released in the Security and Quality Rollup that’s dated October 22, 2024. This update is included in the Security and Quality Rollup that’s dated November 12, 2024. There is no change to this update with this release on November 12, 2024. If you have previously installed this update no action is needed.
Release Date:November 12, 2024
Version:.NET Framework 3.5 and 4.8.1
The October 22, 2024 update for Windows 11, version 22H2 and Windows 11, version 23H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.
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
|
ASP.NET |
- Addresses an issue where "The type initializer for ‘System.Web.UI.Util’ threw an exception." error with design-time compilation in Visual Studio for .NET Framework ASP.Net projects. |
|
CLR1 |
- Address an issue where in rare cases where an infinite loop could occur when a thread enters CLR for the first time. - Address an issue in cases where incorrect interface call devirtualization could occur when JIT optimizations are enabled. - Addresses an issue with a security feature bypass vulnerability when using SecUtility.RandomByte. - Addresses an issue with information disclosure with the performance counter. - Addresses an issue with out of memory exceptions during garbage collection while running applications running under job limits. |
|
.NET Fundamentals |
- Addresses an issue with .NET API UserPrincipal.GetAuthorizationGroups to retrieve the Membership of a particular user. |
1Common Language Runtime (CLR)
Known issues in this update
Microsoft is not currently aware of any issues in this update.
How to get this update
Install this update
|
Release Channel |
Available |
Next Step |
|
Windows Update and Microsoft Update |
No |
See note |
|
Windows Update for Business |
No |
See note |
|
Microsoft Update Catalog |
No |
See note |
|
Windows Server Update Services (WSUS) |
No |
See note |
Note: This update is no longer available. At this time, no functional issues have been reported with this update. To ensure your device continues to receive the latest security updates and quality improvements, we recommend installing the most recent cumulative update.
File information
For a list of the files that are provided in this update, download the file information for cumulative update.
Prerequisites
To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.
Restart requirement
You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.
How to obtain help and support for this update
-
Help for installing updates: Windows Update FAQ
-
Protect yourself online and at home: Windows Security support
-
Local support according to your country: International Support
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