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.

On a computer that is running the Microsoft .NET Framework 3.5 Service Pack 1 (SP1), the just-in-time (JIT) compiler and the Native Image Generator (Ngen.exe) that use the Mscorjit.dll file may generate incorrect code.

957542 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. You must have the .NET Framework 3.5 SP1 installed to apply this hotfix.

To apply this update, you must have .NET Framework 4.5.2 installed. Install this update. None. This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.

Enhanced Key Usage (EKU) is described in RFC 5280 in section 4.2.1.12. This extension indicates one or more purposes for which the certified public key may be used, in addition to or instead of the basic purposes that are indicated in the key usage extension.

To exploit the vulnerability, an attacker would first have to convince the user to open a malicious document or application. This security update addresses the vulnerability by correcting how .NET Framework validates untrusted input. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8421.

To remove this update, use the Programs and Features item in Control Panel. This update does not require a system restart after you apply it unless files that are being updated are locked or are being used. This update replaces previously released updates .

To exploit the vulnerability, an attacker has to pass specific input to an application that uses susceptible .NET Framework methods. This security update addresses the vulnerability by correcting how .NET Framework validates input. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8540.

Durante l'installazione di un aggiornamento per Microsoft .NET Framework 4, lo strumento Native Image Generator (NGen.exe) utilizza un'alta percentuale di cicli di CPU sul computer per diverso tempo. Questo varia in base al numero di immagini native installate nel computer.

Microsoft .NET Framework 4 için bir güncelleştirme yüklediğinizde, Yerel Görüntü Oluşturucu (NGen.exe) bilgisayarda uzun bir süre yüksek yüzdede CPU döngüsü kullanır.