/sys/kernel/security/apparmor/profiles set to -r–r–r– but not readable by non-root user

I’ve tried to upgrade from gnome-boxes 3.28 to 3.32 but it keeps crashing because libvirtd is not able to access:

/sys/kernel/security/apparmor/profiles

As root, I checked the permissions of this files and it’s -r–r–r– and so are all it’s parent directories permissions. I was able to read it’s content as root but the non-wheel user trying to use cat on that file got me a permission denied error.

Is this a bug in ubuntu or am I missing something here?