Update: Dell EMC released VxRail update 4.0.302. It includes the patch. From the release notes: "Customers with all-flash VxRail Appliances with deduplication enabled should contact Support to request an upgrade to VxRauil 4.0.302"
VMWare has released an VSAN patch and their advise is to install immediately. The scope is an all flash vsan with deduplication enabled.  When will be or is there already a VxRail update available?  Documentation; Http://kb.vmware.com/kb/2151042 and [URL]  Cheers!
VMware VSAN patch