diff --git a/release-notes/11.0/preview/rc2/README.md b/release-notes/11.0/preview/rc2/README.md
index f7bd3bf0ae..850b9a6346 100644
--- a/release-notes/11.0/preview/rc2/README.md
+++ b/release-notes/11.0/preview/rc2/README.md
@@ -3,7 +3,7 @@
 Browse the .NET 11 RC 2 release notes by component:
 
 - Libraries
-- Runtime
+- [Runtime](./runtime.md)
 - [SDK](./sdk.md)
 - [MSBuild](./msbuild.md)
 - [NuGet](./nuget.md)
diff --git a/release-notes/11.0/preview/rc2/runtime.md b/release-notes/11.0/preview/rc2/runtime.md
new file mode 100644
index 0000000000..4d7f08c20f
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@@ -0,0 +1,16 @@
+# Runtime in .NET 11 RC 2 - Release Notes
+
+RC 2 concentrates on reliability fixes for the runtime.
+
+## Changes since the previous preview
+
+- **File locking on iOS and tvOS:** CoreCLR now disables advisory file locking by default on iOS and tvOS, including simulators. In RC 1, a `FileStream` could acquire a lock that caused the OS to terminate an app when it entered the background. Apps relying on RC 1's `FileShare` enforcement can restore locking with `DOTNET_SYSTEM_IO_DISABLEFILELOCKING=0` or the `System.IO.DisableFileLocking` switch set to `false`. Mac Catalyst and other platforms keep their existing defaults ([dotnet/runtime #134331](https://github.com/dotnet/runtime/pull/134331)).
+
+<!-- TODO: Validate the iOS/tvOS default on an RC 2 device or simulator. -->
+
+## Bug fixes
+
+- **Linux:** The .NET 11 RC 1 SDK no longer crashes on RHEL 8 Arm64, and the runtime correctly traverses cgroup v2 memory limits at the hierarchy root ([dotnet/runtime #134148](https://github.com/dotnet/runtime/pull/134148), [dotnet/runtime #133693](https://github.com/dotnet/runtime/pull/133693)).
+- **Assembly loading:** Generic virtual dispatch no longer hangs after repeated `AssemblyLoadContext` unloads ([dotnet/runtime #133183](https://github.com/dotnet/runtime/pull/133183)).
+- **Collections:** `ConcurrentQueue.TryDequeue` no longer spuriously reports an empty queue while a segment is being frozen ([dotnet/runtime #132863](https://github.com/dotnet/runtime/pull/132863)).
+- **Windows:** Garbage collection works correctly on machines with multiple CPU groups ([dotnet/runtime #134216](https://github.com/dotnet/runtime/pull/134216)).