This is a maintenance release. The following items were fixed and/or added:
GUI: fixed wrong scrolling behaviour in the VM selector window when a VM item is dragged out of the chooser-pane area
GUI: fixed the validation of IPv6 port-forwarding rules
GUI: suppress the first-run wizard if a CD/DVD medium is inserted using the selector UI
GUI: fixed the Ctrl+Break key sequence scan codes (bug #14927)
GUI: improved handling of text selection mouse pointer (bug #750)
Host services: fixed a crash during VM shutdown under rare conditions (5.0.6 regression; bug #14841)
Shared folders: fixed a sharing violation if a file is opened to check the attributes (Windows hosts only; bug #14450)
Webcam: passthrough fix for certain devices (Mac OS X hosts only)
XHCI: fixed broken emulation if software virtualization is used
XHCI: several fixes
3D: fixed state handling under certain conditions (bug #13487)
Audio: several fixes
BIOS: added LBA64 support for being able to boot from huge hard disks (bug #7415)
EFI: fix for Windows 10 guests
ExtPack: before installing an Extension Pack check if there are VMs running to prevent file system locking issues
rdesktop-vrdp: source code tarball fixes
Windows hosts: fixed hang when using VBoxAuthSimple library for VRDP external authentication (bug #14931)
Windows hosts: fixed a regression which prevented it to attach to a physical network adapter having TCP/IP disabled (bug #14578)
Windows hosts: fixed a regression which caused multi-port adapters to be shown as a single adapter (bugs #14558, #14622)
Windows hosts: fixed a regression which caused created host-only adapters to not appear in the list (bug #14437)
Windows hosts: fixed host-only adapter creation issues related to Windows 10 (bugs #14040, #14545)
Linux hosts: .desktop file compatibility issue (bug #14808)
Linux hosts / guests: fixes for RHEL 7.2 (bug #14866)
The command for recompiling the host kernel modules was changed again, to /sbin/rcvboxdrv setup (bug #14723)
Linux hosts: some fixes for PCI passthrough (still highly experimental)
Linux/Mac OS X hosts: fixed a VM hang during startup under certain circumstances (bug #14933)
Solaris hosts: added Python 2.7 bindings
Mac OS X hosts: fixed a possible crash when the default input or output audio device changes
Mac OS X hosts: fixed a panic under certain conditions
Linux Additions: prevent the compiler from doing dead-code elemination on vital code in guest / host communication (bug #14497)
Linux Additions: when mounting a shared folder, explicitly pass the share name so that /proc/mounts contains this name instead of 'none'
Linux Additions: workaround for a systemd problem in conjunction with SELinux which prevented to properly enable the 'vboxadd' service during while upgrading the Additions