Oracle has released VirtualBox 5.2 Maintenance Release 18.
Oracle VM VirtualBox 5.2.18 release includes improvements and regression fixes for Oracle VM VirtualBox 5.2.
Between them we can mention:
VMM: fix loading with binutils and self-built versions on recent Linux distributions
Networking: fixed "--nataliasmode1" same port configuration for NAT Networks
Virtual Remote-Desktop: fixed VM process termination on RDP client disconnect if 3D is enabled for the virtual machine
The Oracle VirtualBox Team