An update for .NET 9.0 is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of
 Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

.NET is a managed-software framework. It implements a subset of the .NET
 framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available.
 The updated versions are .NET SDK 9.0.102 and .NET Runtime 9.0.1.

Security Fix(es):

* dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)
* dotnet: .NET and Visual Studio Remote Code Execution Vulnerability
 (CVE-2025-21172)
* dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
* dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution
 Vulnerability (CVE-2025-21176)

For more details about the security issue(s), including the impact, a CVSS
 score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

* dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)

* dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution
 Vulnerability (CVE-2025-21176)

* dotnet: .NET and Visual Studio Remote Code Execution Vulnerability
 (CVE-2025-21172)

* dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)

For more details about the security issue(s), including the impact, a CVSS
 score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-21171: Heap-based Buffer Overflow (CWE-122)
CVE-2025-21172: Integer Overflow or Wraparound (CWE-190)
CVE-2025-21173: Creation of Temporary File in Directory with Insecure
 Permissions (CWE-379)
CVE-2025-21176: Buffer Over-read (CWE-126)