Symptoms. When you install an update for the Microsoft .NET Framework 4, the Native Image Generator (NGen.exe) uses a high percentage of the CPU cycles on the computer for a long time. This time varies with how many Native Images are installed on the computer.

FIX: On a computer that is running the .NET Framework 3.5 Service Pack 1, the JIT compiler and the Native Image Generator (Ngen.exe) that use the Mscorjit.dll file may generate incorrect code - Microsoft Support.

Security and Quality Rollup for .NET Framework 4.5.2 for Windows 8.1, RT 8.1, and Windows Server 2012 R2 (KB4578956) - Microsoft Support.

January 9, 2024-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5033915) .NET. Applies to: Microsoft .NET Framework 4.8. REMINDER. As a reminder to advanced IT administrators, updates to .NET Framework 3.5 for Windows Server 2012 R2 should only be applied on systems where .NET Framework 3.5 is present and enabled.

December 13, 2022-Security and Quality Rollup for .NET Framework 4.8 for Windows 8.1, RT 8.1, and Windows Server 2012 R2 (KB5020878) Note: Revised on Jun 20, 2023 to add resolution to known issue. As a reminder to advanced IT administrators, updates to .NET Framework 3.5 for Windows 8.1 and Windows Server 2012 R2 should only be applied on ...

The September 12, 2023 update for Windows Server 2012 includes cumulative security and reliability improvements in .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2. We recommend that you apply this update as part of your regular maintenance routines.

October 11, 2022-Security and Quality Rollup for .NET Framework 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB5018516) .NET. Applies to: Microsoft .NET Framework 4.8. IMPORTANT Verify that you have installed the required updates listed in the How to get this update section before installing this update.

How to get this update. Before installing this update. Prerequisite: To apply this update, you must have .NET Framework 4.8 installed. Install this update. Restart requirement. You may need to restart the computer after you apply this update if any affected files are being used.

Security Improvements. CVE-2023-24897 - .NET Framework Remote Code Execution Vulnerability. This security update addresses a vulnerability in the MSDIA SDK where corrupted PDBs can cause heap overflow, leading to a crash or remove code execution. For more information see CVE-2023-24897.

Release Channel. Available. Next Step. Windows Update and Microsoft Update. Yes. None. This update will be downloaded and installed automatically from Windows Update.