Multiple security issues were discovered in .NET affecting versions of dotnet8, dotnet10, and dotnet11 on Ubuntu. These issues have been addressed by updating to newer upstream .NET versions. The updates include security fixes, bug fixes, new features, and possibly incompatible changes. The fixed versions are available for Ubuntu 22.04 LTS, 24.04 LTS, 26.04 LTS, and 26.10 releases.