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VirtualBox development code now supports Linux's native KVM backend. Oracle explains that while KVM integration is coming, VirtualBox's custom hypervisor still offers advantages including advanced networking modes, better emulation accuracy for older operating systems like DOS, ring 0 device emulation optimizations, VM exit reduction techniques, and a more advanced instruction emulator. These benefits primarily matter for legacy or exotic guest systems, while modern workloads may not notice significant differences. This follows a similar trend of VMware Workstation also moving to KVM on Linux.

Latest VirtualBox Code Begins Supporting KVM Backend