VirtualBox v4.2.18 is released. VirtualBox is a general-purpose full virtualizer for x86/x64 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

VirtualBox v4.2.18 Changelog:
VMM: properly handle NMIs on Linux hosts with X2APIC enabled
VMM: fixed potential crashes with 64-bit guests on 32-bit hosts (bug #11979)
GUI / seamless: properly handle mouse wheel scroll events
GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively (bug #10311)
GUI: prevent crashes under certain conditions on X11 hosts
3D: multiscreen fixes (incorrect mouse position, flickers)
3D Support: several fixes for the Windows WDDM video driver (multiscreen, seamless)
Snapshots: made live snapshots work again (bug #9255)
Teleportation: made it work again (bug #9455)
VBoxManage: on snapshot take, --pause is default and --live is for doing live snapshots
VBoxSVC: don't crash on systems with many VLAN interfaces (Solaris hosts only)
Network: after the host resumes from suspend, disconnect and reconnect the virtual network cables to force renewing the DHCP leases for the guests. So far only Mac OS X hosts and Windows hosts (bug #10063).
NAT: on name server changes force a reconnect of the virtual network cable to notify the guest (Mac OS X hosts only)
Mac OS X installer: keep previously installed Extension Packs on VirtualBox upgrade
Linux hosts / guests: Linux 3.11 fixes (bug #12001)
Solaris hosts: fixed a potential kernel panic caused due to unexpected preemption due to logging.
Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB3 ports.
Linux Additions: added PCI device identifier to vboxvideo.ko fixing DRI initialization under certain conditions (bug #11957)
Linux Additions: fixed udev detection in the init script with Linux 3.x kernels

Download: VirtualBox v4.2.18
Source: Here