Download VirtualBox 4.3.22

Oracle has released version 4.3.22 of VirtualBox. VirtualBox can be used to install other operating systems in a virtual environment on a computer. In this way it is possible to use different operating systems on the same hardware side by side and at the same time. VirtualBox is available for Windows XP and above, OS X, Linux, and Solaris, and is capable of many guest operating systems to turn.

In version 4.3 of VirtualBox, the complete virtualization code has been rewritten, among other things, which has fixed several problems and also shows several performance improvements. There is also video capture and support for ipv6, various virtual machines running on the same computer can now communicate with each other via the internal network and there is support for multi-touch screens. This twelfth update also contains the following improvements:

The following items were fixed and/or added:

• VMM: refined measurement of TSC frequency on the host, improves timekeeping for guests
• VMM: decreased CPU load resulting from guest MMIO writes to the virtual APIC
• VMM: fixed interception of debug exceptions, observed while using the dbx debugger on Solaris guests (VT-x only)
• GUI: 3D overlay window positioning code improved, fixed potential misplacement of 3D accelerated guest graphics content
• GUI: fixed accident SSL authentication failures during update check on Windows hosts (bug #12969†
• GUI: never send the “ACPI power” keyboard scancode to the guest, we have the ACPI power button for that
• GUI: was unable to properly restore seamless mode VM from snapshot/saved-state under some circumstances
• VBoxHeadless: don’t crash if 3D is enabled in the VM settings (bug #10250†
• ATA: fixed several passthrough issues (bugs #12310† #1360†
• Audio: fixed DirectSound failure when the the host has no audio input device (Windows hosts only; bug #9205†
• SB16: fixed compatibility issue (bug #13769†
• Storage: fixed broken CD/DVD passthrough when using the IDE controller (bug #12310†
• NAT: new ping proxy for Windows hosts (bug #11871†
• NAT: Properly report outbound connect(2) failures to guest with TCP RST or ICMP (bug #10525†
• NAT Network: no need for frequent wakeups in VBoxNetDHCP and VBoxNetNAT (bug #11681†
• Host-only adapter: prevent Windows from creating an “Unidentified network” (bug #9688†
• Bridged Networking: don’t leak host-to-guest traffic to the wireless network when bridging to a wireless interface (bug #13714†
• Main: fixed a possible race when changing the medium leading to a deadlock under rare conditions (bug #13722†
• VBoxManage: fixed return code if starting a VM failed (bug #13773†
• API: fixed 2 deadlock opportunities related to medium handling (bugs #13789† #13801thank you Alexander Urakov)
• API: fixed bug in XPCOM which created too few worker threads, sporadically resulting in a deadlock (bug #13802thank you Alexander Urakov)
• SDK: fixed a garbage collection leak in the Python VirtualBox webservice API binding (bug #13817†
• Linux hosts: fixes for activated SMAP (Broadwell and later, bug #13820†
• X11 guests: prevent unwanted hiding of guest screens on multi-monitor guests (bug #13287†
• X11 guests: added support for X.Org Server 1.17
• X11 Additions: fixed a memory leak in VBoxService if libdbus is available but dbus-daemon isn’t running (bug #13770†
• Windows Additions: prevent VBox WDDM driver from loading if host reports weak OpenGL capabilities. 3D content now can be shown about Remote Desktop connection.
• Winodws Additions: some fixes for recent Windows 10 Previews
• Linux Additions: fixed a compatibility issue with 64-bit Linux 2.4 kernels
• Linux Additions: fixed a potential use-after-free when unloading the VBoxGuest module
• Linux Additions: Linux 3.19 fixes (bug #13741†