Closed issue by thomas-t-w on void-packages repository

https://github.com/void-linux/void-packages/issues/14440

Description:
eudev ships 50-default.rules which contains
KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"
base-files shipps 66-kvm.rules which contains
KERNEL=="kvm", GROUP="kvm", MODE="0660"

If I had to make a decision, I would vote for 0660 and require users to add themselves to the kvm group but that is only because I am not qualified to speak about the security implications of letting everyone access the kvm module. We could always print an install message for qemu telling users they had to add themselves to the kvm group. I would like to let someone who knows more about this make the final decision though.