.NET September 2026 security Updates - .NET 10.0.12, .NET 9.0.20, .NET 8.0.31

# .NET September 2026 Update

## Release Notes

- [10.0.12](https://github.com/dotnet/core/blob/main/release-notes/10.0/10.0.12/10.0.12.md)
- [9.0.20](https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.20/9.0.20.md)
- [8.0.31](https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.31/8.0.31.md)

## Status

| Artifact | 10.0.12 | 9.0.20 | 8.0.31 |
|---|---:|---:|---:|
| Installers/Binaries | ✅ | ✅ | ✅ |
| Container Images (Linux) | ✅ | ✅ | ✅ |
| Container Images (Windows) | ✅ | ✅ | ✅ |
| Winget Packages | | | |
| Linux Installers (Microsoft distribution) | | | |
| Debian 12 | ✅ | ✅ | ✅ |
| OpenSUSE 15 | ✅ | ✅ | ✅ |
| Rocky 9 | ✅ | ✅ | ✅ |
| Ubuntu 20.04 | ✅ | ✅ | ✅ |
| Ubuntu 22.04 | ✅ | ✅ | ✅ |

## Issues

Please report any issues you find either by responding to this issue or by opening a new issue in one of the following repos:

- ASP.NET Core: [dotnet/aspnetcore](https://github.com/dotnet/aspnetcore/issues)
- Entity Framework Core: [dotnet/efcore](https://github.com/dotnet/efcore/issues)
- .NET CLI/SDK: [dotnet/sdk](https://github.com/dotnet/sdk/issues)
- .NET runtime: [dotnet/runtime](https://github.com/dotnet/runtime/issues)
- WinForms: [dotnet/winforms](https://github.com/dotnet/winforms/issues)
- WPF: [dotnet/wpf](https://github.com/dotnet/wpf/issues)
- NuGet: [nuget/home](https://github.com/nuget/home/issues)
- Containers: [dotnet/dotnet-docker](https://github.com/dotnet/dotnet-docker)
- Winget: [microsoft/winget-pkgs](https://github.com/microsoft/winget-pkgs)