You must sign these kernel modules before using VirtualBox: vboxdrv vboxnetflt vboxnetadp code example

Example: If your system is using EFI Secure Boot you may need to sign the kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load them.

sudo -i
    cd /root/module-signing
    chmod 700 /root/module-signing/sign-vbox-modules
    ./sign-vbox-modules