Oracle has released VirtualBox 5.2 Maintenance Release 16.
Oracle VM VirtualBox 5.2.16 release includes improvements and regression fixes for Oracle VM VirtualBox 5.2.
Between them we can mention:
Linux Hosts: introduced VirtualBox build for openSUSE 15.0
Linux Hosts: various build fixes for distribution builds
OVF (Open Virtualization Format): improved the compatibility for the open format
At the same time, Oracle VM VirtualBox 5.2.16 includes the CPU (Critical Patch Update for July 2018); to get further details on security fixes see official "Critical Patch Update Advisory - July 2018".
The Oracle VirtualBox Team