Preconfiguring packages ...
(Reading database ... 2336802 files and directories currently installed.)
Preparing to unpack .../grub-efi-amd64_2.02+dfsg1-8kali1_amd64.deb ...
Unpacking grub-efi-amd64 (2.02+dfsg1-8kali1) over (2.02+dfsg1-8kali1) ...
Setting up grub-efi-amd64 (2.02+dfsg1-8kali1) ...
Installing for x86_64-efi platform.
Could not prepare Boot variable: No space left on device
grub-install: error: efibootmgr failed to register the boot entry: Input/output error.
Failed: grub-install --target=x86_64-efi  
WARNING: Bootloader is not properly installed, system may not be bootable
Generating grub configuration file ...
Found background image: .background_cache.png
Found linux image: /boot/vmlinuz-4.18.0-kali2-amd64
Found initrd image: /boot/initrd.img-4.18.0-kali2-amd64
done
Scanning processes...                                                           
Scanning processor microcode...                                                 
Scanning linux images...                                                        

Running kernel seems to be up-to-date.

The processor microcode seems to be up-to-date.

No services need to be restarted.

No containers need to be restarted.

No user sessions are running outdated binaries.