VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Some of the features of VirtualBox are:
- Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
- Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
- GUI: fixed issue with opening '.vbox' files and it's aliases.
- GUI: keyboard grabbing fixes.
- GUI: fix for passing through Ctrl + mouse-click.
- GUI: fixed automatic deletion of extension pack files.
- USB: fixed showing unknown device instead of the manufacturer or product description under certain circumstances.
- XHCI: another fix for a hanging guest under certain conditions as result of the fix for bug. #15747, this time for Windows 7 guests.
- Serial: fixed high CPU usage with certain USB to serial converters on Linux hosts.
- Storage: fixed attaching stream optimized VMDK images.
- Storage: reject image variants which are unsupported by the backend.
- Storage: fixed loading saved states created with VirtualBox 5.0.10 and older when using a SCSI controller.
- Storage: fixed broken NVMe emulation if the host I/O cache setting is enabled.
- Storage: fixed using multiple NVMe controllers if ICH9 is used.
- NVMe: fixed a crash during reset which could happen under certain circumstances.
- Audio: fixed microphone input.
- Audio: fixed crashes under certain conditions.
- Audio: fixed recording with the ALSA backend.
- Audio: fixed stream access mode with OSS backend.
- E1000: do also return masked bits when reading the ICR register, this fixes booting from iPXE.
- BIOS: fixed 4bpp scanline calculation.
- API: relax the check for the version attribute in OVF/OVA appliances.
- Windows hosts: fixed crashes when terminating the VM selector or other VBox COM clients.
- Linux Installer: fixed path to the documentation in .rpm packages.
- Linux Installer: fixed the vboxdrv.sh script to prevent an SELinux complaint.
- Linux hosts: don't use 32-bit legacy capabilities.
- Linux Additions: Linux 4.8 fix for the kernel display driver.
- Linux Additions: don't load the kernel modules provided by the Linux distribution but load the kernel modules from the official Guest Additions package instead.
- Linux Additions: fix dynamic resizing problems in recent Linux guests.
- User Manual: fixed error in the VBoxManage chapter for the getextradata enumerate example.