VirtualBox 6.0.6 for PC Windows

The following items were fixed and/or added:
VMM: Fixed missing NULL pointer check in MMIO code.
Storage: fixed having multiple NVMe controllers with ICH9 enabled (5.2.0 regression).
Network: fixed wireless detection regression when bridging to adapters with unbound IP protocols.
Network: fixed VERR_INTNET_FLT_IF_NOT_FOUND when bridging to some adapters on Windows hosts.
Audio: Fixed interrupt storm in FreeBSD guests with HDA.
Keyboard: Introduced a small delay to fix old software which expects to be able to read an incoming scan code more than once.
Windows installer: Removed the "Ignore" action in the case the current VBox installation is still running, as the (successful) update will not work until a host reboot is performed.
NAT: Handle nameserver 0.0.0.0 which is a valid setting.
BIOS: INT 15h/87h service must disable A20 gate when done.
Linux Guest Additions: fix a hang starting KDE Plasma.

The following items were fixed and/or added:
VMM: added support for FSGSBASE, PCID, INVPCID CPU features for guests.
VMM: fixed EMM386 issue with detecting suitable page frame base.
Front end: Linux: prevent VM window from jumping and auto-resizing to tiny size after resizing it on HiDPI screen.
Front end: Linux: fixed seamless regression caused by wm_class functionality.
Front end: switched to https downloads.
Front end: fixed crash while opening New machine wizard.
Audio: added support for distinguishing recording sources in the PulseAudio mixer on the host when multiple VMs are running.
Audio: various fixes for the DirectSound backend.
Video recording: added better file seeking support and fixed playback of recorded files with certain players (e.g. Firefox).
Audio: various fixes for Windows guest surround setups.
Audio: various fixes for HDA emulation.
Serial: fixed an issue where the serial port parameters in the emulation and host serial port got out of sync.
Storage: fixed overwriting certain INQUIRY data for the DVD/CD drive attached to a AHCI controller.
Storage: fixed handling VMDK images created by Amazon EC2 VM export.
Network: fixed PXE boot regression in e1000.
Network: Added a workaround for older guests which do not enable bus mastering for the virtio PCI device.
3D: add environment variable to configure presenting 3D content on main thread.
Windows hosts: fixed indiscriminate binding of NDIS5 bridged driver, that caused PPPOE malfunction.
Windows guests: fixed incorrect function error when using shared folders in certain appli-cations.
Linux guests: Linux 4.15 support.
Linux guests: fixed black screen when 3D enabled in guests.
Linux guests: suppress setuid and setgid in shared folders.

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.

VMM: reset the TSC on VM reset to work around a Windows bug.
Audio: fixed memory leak when enabled with VRDP connections (5.1.24 regression).
Audio: fixed creation of too many sound sinks on Linux hosts when using the PulseAudio backend.
Audio: implemented record gain registers for AC'97 emulation; those are needed for newer Ubuntu guests which rely on those when controlling gain and muting the recording (capturing) levels.
Storage: fixed hang when using the emulated NVMe controller with the SPDK.
Mouse: double click was not working with a precision touchpad.
Linux hosts: properly bring up host-only network interfaces with iproute (5.1.24 regression).
Linux hosts: provide Python 3 libraries for deb/rpm packages.
Windows hosts: make it possible to use host-only networking without having bridged networking installed.
Windows guests: fixed automatic logons for Vista and newer Windows guests (5.1.24 regression).

The following items were fixed and/or added:
VMM: mask the VME CPUID capability on AMD Ryzen processors for now to make certain guests works, for example Windows XP.
VMM: emulate more SSE2 instructions.
VMM: properly clear the TF and AC flags when dispatching real-mode interrupts.
GUI: fixes to make the mini-toolbar work with recent versions of KDE / Plasma.
GUI: fixed a potential crash when a VM with multiple screens is running in full screen / seamless mode and a host screen is removed, for example when connecting to the host via RDP.
GUI: fixed initial size hints for guests which set intermediate sizes before responding.
GUI: prevent stopped screen updates or black screen on reboot in a multi-screen setup under certain conditions.
Audio: many improvements for Windows 10 guests.
Storage: fixed possible crash when using Intels SPDK.
API: use the correct file name of the VM machine state if the VM settings directory is renamed, for example during grouping / ungrouping a VM.
API: return the correct error code if powering up a VM fails.
API: video recording did not automatically start at VM start when enabled in the VM settings.
API: when relocating a medium, check that the target path is fully qualified.
EFI: fix for VMs with more than 3504MB RAM.
Host-only adapter: correctly determine IPv4 netmasks on Windows hosts.
NAT network: properly do the refcounting for starting / stopping the NAT / DHCP services if the NAT network is changed while the adapter network connection type is anything else but NAT network.
VBoxManage: fixed controlvm videocapfile.
Windows hosts: fixed crashes if driver verifier is enabled.
Linux / Mac OS X hosts: more fixes for loading shared libraries (5.1.20 regression).
Linux hosts / guests: Linux 4.12 fixes.
Linux hosts / guests: reduce the kernel stack consumption for Linux kernels with CONFIG_CPUMASK_OFFSTACK defined.
Linux hosts / guests: fixes for kernel modules built with gcc-7.
Linux hosts / guests: Linux 4.13 fix.
Linux hosts: don't depend on net-tools on newer distributions as this package is deprecated in favour of iproute.
Linux hosts: make 2D video acceleration available for older Linux distributions (5.1 regression).
Linux Additions: fix for dynamic resizing with Oracle Linux 6 with UEK4.
Linux Additions: make Fedora 25 and 26 Alpha work when 3D pass-through is enabled.
Linux Additions: no longer recommend removing distribution- installed Additions if they are updated to our guidelines.

VMM: fixed VERR_IEM_INSTR_NOT_IMPLEMENTED Guru Meditation under certain conditions (5.1 regression; mostly Mac OS X hosts).
VMM: fixed software virtualization on Solaris hosts (5.1.20 regression).
Storage: fixed a potential hang under rare circumstances.
Storage: fixed a potential crash under rare circumstances (asynchronous I/O disabled or during maintenance file operations like merging snapshots).
Linux hosts: make the ALSA backend work again as well as loading the GL libraries on certain hosts (5.1.20 regression).
Linux Additions: fixed mount.vboxsf symlink problem (5.1.20 regression).

GUI: don't check if the Extension Pack is up-to-date if the user is about to install a new Extension Pack.
GUI: fixed a possible crash when switching a multi-monitor VM into full-screen or seamless mode.
GUI: fixed non-literal shortcuts if the keyboard is not captured (5.1.10 regression; Windows hosts only).
GUI: several mini-toolbar fixes in full-screen / seamless mode (X11 hosts only).
GUI: don't crash on restoring defaults in the appliance import dialog.
Windows Additions: another fix for automatic logins for Windows Vista and newer.
ICH9: fix for Windows guests with a huge amount (>64G) of guest memory.
BIOS: fixed El Torito hard disk emulation geometry calculation.

The following items were fixed and/or added:
Shared Folders: fixed case insensitive filename access (5.1.16 regression; Windows guests only)
Shared Folders: fixed access to long pathes (5.1.16 regression; Windows guests only)
API: fixed snapshot handling of medium attachments and PCI device attachments
API: make 32-bit Windows guests in raw mode boot again if the ICH9 chipset is used (5.1.16 regression)
VBoxBugReport: fixed VM log collection issue
Linux hosts: fixed autostart service script
Windows Additions: fixed automatic logins for Windows Vista and newer (5.1.4 regression)

VMM: don't access the MSR_IA32_SMM_MONITOR_CTL MSR if dual-monitor treatment is not available.
VMM: another fix for handling certain MSRs on ancient CPUs without VT-x support for MSR bitmaps.
VMM: fixed VERR_SSM_LOAD_CPUID_MISMATCH errors when restoring a saved state with SMP guests on hosts without the CPUID/HTT bit set.
VMM: fixed a bug in call gate emulation.
VMM: FWAIT instruction fix.
VMM: fixed a sporadic guest hang under certain conditions.
GUI: hide the mini-toolbar from the taskbar and the pager on certain X11 hosts.
GUI: better error handling on the global settings / network / host-only / DHCP server settings.
GUI: fixes for full-screen with multiple screens.
Host-only Network: fixed host-only adapter creation issue preventing VirtualBox installation on Windows 10 hosts.
NAT network: fixed two potential crashes in the DHCP server.
ICH9: fixed incorrect initialization of the primary bus for PCI bridges.
Storage: LsiLogic fix for Windows 10.
USB: fixed not being able to attach certain USB devices having invalid characters in the device strings.
USB: several fixes for the USB/IP support.
VBoxSVC: fixed another crash during shutdown under rare circumstances.
VBoxSVC: fixed a stack overflow on.
OVF: when importing an appliance handle more than 10 network adapters if the OVA was created by VirtualBox.
OVF: fixes for exporting and importing appliances with many disks.
VBoxManage: fixed regression with modifyhd --resize.
rdesktop-vrdp: source code tarball fixes.
Linux Installers: do not rebuild kernel modules unnecessarily.
Linux hosts: added an action for opening the VM manager window to the .desktop file.
Linux hosts / guests: Linux 4.11 compile fixes.
Linux Additions: added vboxsf FS modules alias.
Linux Additions: fix for the shared folders kernel module to compile on Linux 4.10.
Linux Additions: properly install the Linux kernel module override rule on distributions without /etc/depmod.d.
Windows Additions: fixed a crash with recent Windows 10 builds if 3D is disabled.

- VMM: fixed emulation of certain instructions for 64-bit guests on 32-bit hosts
- VMM: properly handle certain MSRs for 64-bit guests on ancient CPUs without VT-x support for MSR bitmaps
- GUI: fixed a crash with multimonitor setups under certain conditions
- GUI: allow cloning of snapshots when the VM is running
- NVMe: fixed compatibility with the Storage Performance Development Kit
- VBoxSVC: fixed a crash under rare circumstances
- VBoxManage: added a sanity check to modifymedium --resize to prevent users from resizing their hard disk from 1GB to 1PB
- Windows hosts: another fix for recent Windows 10 hosts
- Linux hosts: Linux 4.10 fixes
- Linux Additions: fixed protocol error during certain operations on shared folders