Sounds like a job for the Linux Foundation maybe?
You don't need anyone's permission to make a distro, that's true, but if you notify Debian, Canonical, Fedora, Red Hat and Arch you're covering a very large fraction of users; way more than today's 0%. In cases like this, perfect is the enemy of the good.
A rogue actor may create a new distro, maybe for some niche use case such as accessibility or retro gaming. After acquiring enough false (and even some real) users that the Linux Foundation accepts them as a notifiable distro maintainer, this maintainer could then pwn machines before the exploit is made public.
The Linux Foundation hasn't been about Linux (except marginally) in a long while, if ever.
The name is a misnomer.