Microsoft Edge Partial Page Loading Memory Corruption

There is a security issue in Microsoft Edge related to how HTML documents are loaded. If Edge displays a HTML document from a slow HTTP server, it is possible that a part of the document is going to be rendered before the server has finished sending the document. It is also possible that some JavaScript code is going to trigger. By making DOM modifications before the document had a chance of fully loading, followed by another set of DOM modifications after the page has been loaded, it is possible to trigger memory corruption that could possibly lead to an exploitable condition.
Source: Microsoft Edge Partial Page Loading Memory Corruption