Seabios vs OVMF (UEFI) | Security & OpenSource Question


Sep 21, 2022
I am currently in the process of choosing settings for my new VM Templates and one thing i am still not sure about is if i should use Seabios or OVMF as my new standard.
Already did some research and saw the stuff / problems regarding pcie passthrough with seabios and i am aware that i might need to choose seabios for some vm templates and uefi for others depending on use case.

Ok so the questions that are still open:
  1. Are there any obvious drawbacks to just sticking to uefi, if i dont mind the extra efi disks and stick to newer Operating Systems?
  2. Is there a security difference between seabios and uefi?
  3. Is ovmf (uefi) effected / vulnerable to the same uefi-rootkits / exploits as their hardware counterparts?
  4. Has Seabios similar problems like mentioned in 3?
  5. OVMF itself is as far as i figured out opensource, most uefi implementations not,
    is there any additional proprietary code in a vm using ovmf compared to an identical one running seabios?
Thanks for all answers :)


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