A smartscreen bypass flaw was found in the downloads component of the Chromium browser. Upstream bug(s): https://code.google.com/p/chromium/issues/detail?id=819809 External References: https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html
Created chromium tracking bugs for this issue: Affects: fedora-all [bug 1568801] Affects: epel-7 [bug 1568800]
SmartScreen is a feature of the Microsoft Windows operating system / Microsoft Windows Defender, hence this flaw would not be relevant to non-Windows builds of Chrome / Chromium.