Microsoft IE11: use-after-free in jscript!JsErrorToString(CVE-2017-11810)

There is a use-after-free in jscript.dll library that can be exploited in IE11. jscript.dll is an old JavaScript library that was used in IE 8 and back. However, IE11 can still load it if put into IE8 compatibility mode and if there is a script tag that can only be understood by the older library...