.NET 9.0 Security Update — AlmaLinux 8 (ALSA-2026:41899)

.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 9.0.119 and .NET Runtime 9.0.18.

Security Fix(es): …

.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 9.0.119 and .NET Runtime 9.0.18.  

Security Fix(es):  

  * dotnet: SocketsHttpHandler Http2Connection - HTTP/2 SETTINGS/PING ACK flood causing OOM (CVE-2026-50651)
  * dotnet: .NET Core: Denial of Service via type confusion (CVE-2026-57108)
  * ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-56170)
  * ASP.NET Core: ASP.NET Core: Privilege Escalation via Incorrect Authentication Algorithm (CVE-2026-47300)
  * ASP.NET Core: ASP.NET Core: Privilege Elevation via Authentication Bypass (CVE-2026-47303)
  * dotnet: .NET Security Feature Bypass Vulnerability (CVE-2026-47304)
  * dotnet: .NET: Denial of Service vulnerability due to uncontrolled resource allocation (CVE-2026-47302)
  * dotnet: .NET Framework: Privilege escalation via code injection (CVE-2026-50650)
  * dotnet: .NET: Security feature bypass due to incorrect authorization (CVE-2026-50528)
  * dotnet: .NET: Local code execution via deserialization of untrusted data (CVE-2026-50649)
  * dotnet: .NET: Local tampering via improper link resolution (CVE-2026-50526)
  * dotnet: .NET Framework: Local Code Execution via Protection Mechanism Failure (CVE-2026-50646)
  * dotnet: .NET: Denial of Service due to uncontrolled resource allocation (CVE-2026-50525)
  * dotnet: .NET Framework: Denial of Service via network-based buffer overflow (CVE-2026-50527)
  * dotnet: .NET Framework: Remote Denial of Service due to uncontrolled resource allocation (CVE-2026-50648)
  * .NET: .NET: Network Spoofing Vulnerability (CVE-2026-50659)
  * dotnet: .NET Framework: Denial of Service via improper input validation (CVE-2026-50524)

Bug Fix(es) and Enhancement(s):  

  * Update .NET 9.0 to SDK 9.0.119 and Runtime 9.0.18 (JIRA:AlmaLinux-192469)

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.