VirtualBox v4.3.24 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 v4.3.24 Changelog:
VMM: emulation fix for the ENTER instruction under certain conditions; fixes Solaris 10 guests (VT-x without unrestricted guest execution)
VMM: fix for handling NMIs on Linux hosts with X2APIC enabled
NAT/NAT Network: fix connection drops when the host's DHCP lease was renewed (4.3.22 regression; Windows hosts only; bug #13839)
NAT: don't crash on an empty domain list when switching the DNS host configuration (4.3.22 regression; Mac OS X hosts only; bug #13874)
PXE: re-enable it on Windows hosts (4.3.22 regression; Windows hosts only; bug #13842)
Shared Folders: fixed a problem with Windows guests (4.3.22 regression; bug #13786)
Audio: improved record quality when using the DirectSound audio backend
VBoxManage: when executing the controlvm command take care that the corresponding VM runtime changes are saved permanently (bug #13892)
Windows Installer: properly install the 32-bit version of VBoxRes.dll on 32-bit hosts (bug #13876)
Linux hosts / guests: Linux 4.0 fixes (bug #13835)
OS/2 Additions: fixed mouse integration (4.3.22 regression; bug #13825)
X11 Additions: fixed a sporadic failure to deactivate virtual screens (bug #13845)

Download: VirtualBox v4.3.24
Source: Here