April 2024 cumulative update preview
Released April 23, 2024
Summary of what's new in this release
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
This release contains the following quality and reliability improvements.
CLR
Addresses an issue where crashes can occur if several threads all concurrently query the ITypeInfo implementation of the same managed type. (Applies to: .NET Framework 4.8, 4.8.1.)
Addresses an issue where ISymUnmanagedReader::GetMethodsFromDocumentPosition and ISymUnmanagedReader2::GetMethodsInDocument might return incorrect results under certain circumstances. (Applies to: .NET Framework 4.8.1.)
.NET libraries
Addresses an issue that can be triggered in the fbx file parser. (Applies to: .NET Framework 4.8, 4.8.1.)
Addresses an issue to use NIST-validated implementations of FIPS algorithms. (Applies to: .NET Framework 4.8, 4.8.1.)
.NET fundamentals
Addresses an issue with wildcard format changes introduced in IIS 10. (Applies to: .NET Framework 4.8, 4.8.1.)
WPF
Addresses an issue where apps crash when calling the GetWindowText and GetWindowTextLength methods. (Applies to: .NET Framework 4.8, 4.8.1.)
Known issues
This release contains no known issues.
Summary tables
The following table outlines the updates in this release.
| Product version | Cumulative update preview |
|---|---|
| Windows 11, version 22H2 and Windows 11, version 23H2 | |
| .NET Framework 3.5, 4.8.1 | 5037591 |
| Windows 10, version 22H2 | 5037724 |
| .NET Framework 3.5, 4.8 | 5037592 |
| .NET Framework 3.5, 4.8.1 | 5037587 |
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.
