root@kali:~# apt install libelf-dev
E: unable to locate package libelf-dev
root@kali:~# apt install virtualbox-guest-dkms
E: Unable to locate package virtualbox-guest-dkms
?
Updating to latest kernel as of today breaks built in VBOXAdditions.
Apparently Guest Additions now needs libelf-dev to build properly as per this post
https://www.mail-archive.com/debian-...msg109908.html
apt install libelf-dev
apt install virtualbox-guest-dkms
fixes the issue
root@kali:~# apt install libelf-dev
E: unable to locate package libelf-dev
root@kali:~# apt install virtualbox-guest-dkms
E: Unable to locate package virtualbox-guest-dkms
?