diff --git a/WSL/release-notes.md b/WSL/release-notes.md
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@@ -12,6 +12,12 @@ ms.assetid: 36ea641e-4d49-4881-84eb-a9ca85b1cdf4
 
 # Release Notes
 
+## Build 18272
+For general Windows information on build 18272 visit the [Windows blog](https://blogs.windows.com/windowsexperience/2018/10/31/announcing-windows-10-insider-preview-build-18272/).
+
+### WSL
+* **WARNING:** There is an issue in this build that makes WSL inoperable. When trying to launch your distribution you will see a “No such interface supported” error. The issue has been fixed and will be in next week's Insider Fast build. If you've installed this build you can roll back to the previous Windows build using “Go back to the previous version of Windows 10” in Settings->Update & Security->Recovery.
+
 ## Build 18267
 For general Windows information on build 18267 visit the [Windows blog](https://blogs.windows.com/windowsexperience/2018/10/24/announcing-windows-10-insider-preview-build-18267/).