.NET 9.0.11 servicing release
.NET 9.0.11 was released on 2025-11-19. It ships .NET Runtime 9.0.11, ASP.NET Core Runtime 9.0.11, SDK 9.0.308, 9.0.307, 9.0.112. .NET 9.0 is an STS release currently in the "maintenance" support phase, with support ending on 2026-11-10. It has since been superseded by .NET 9.0.21.
What was released From the source
According to Microsoft's official .NET release metadata, .NET 9.0.11 was published on 2025-11-19. The components and versions in this release are:
- Release: .NET 9.0.11
- Release date: 2025-11-19
- .NET Runtime: 9.0.11
- ASP.NET Core Runtime: 9.0.11
- SDK versions: 9.0.308, 9.0.307, 9.0.112
- C# language version: 13.0
- Visual Studio versions: 17.14.21
- Release type: STS
- Support phase: Maintenance (security fixes only)
- End of support: 2026-11-10
- Latest .NET 9.0 release: 9.0.21
- Security release: No
At a glance · .NET release
About 1 month of support left
Why it matters Analysis
This is a past servicing release. Each .NET patch includes the fixes from earlier patches in the same channel, so applications should run the latest .NET 9.0 release, 9.0.21, rather than this one.
.NET 9.0 is in the maintenance phase, which means it receives security fixes only until 2026-11-10. Teams still on this version should plan an upgrade to a newer supported release.
Who should care Analysis
- Teams running .NET 9.0 applications in production or testing
- Owners of container images built on .NET 9.0 base images
- Teams that publish self-contained or single-file applications
- Developers and CI pipelines that pin an SDK version in global.json
How to update Analysis
- Check installed versions with
dotnet --list-runtimesanddotnet --list-sdks. - Install the latest .NET 9.0 release, 9.0.21, from the official download page or your operating system's package manager.
- Rebuild container images so they pick up the updated base image, and rebuild self-contained apps.
- Read the release notes for known issues and run your test suite before rolling out to production.
Sources and further reading
- .NET 9.0.11 release notes (original source)
- .NET 9.0 release metadata (JSON) (official)
- Download .NET 9.0 (official)
- .NET support policy (documentation)
Original: “.NET 9.0.11 released”, .NET release metadata, published 19 Nov 2025, retrieved 16 Oct 2026. This article was generated from the official source using our structured templates and passed automated quality checks. Spotted a mistake? See our corrections policy.