Honestly, if you’re running public facing services, you should run the latest everything you can. There’s a risk that stuff breaks, but at least you’re not having to worry about patched exploits.

If you are relying on Docker as a security boundary you are making a mistake.

Docker isolation is good enough to keep honest people honest but isn’t good enough to keep out malicious actors. The Linux kernel API is simply too large of an attack surface to be highly secure.

If you want to run completely untrusted software you want a VM boundary at a very minimum. Ideally run it on completely separate hardware. There are few exceptions like browser isolation and gVisor which are strong software isolation without a VM but docker or any Linux container runner is not on that list. If the software has direct access to the host kernel it shouldn’t be considered secure.

Don’t run docker, so far it has proven quite insecure, and that was by design at first because docker was created for development environments and not for deployment.

Later docker added better security, because they understood the value in deployment too. But many distro are still insecure by default and it takes both the effort of sysadmins and image developers to deploy securely docker containers.

I switched to Podman: no daemon, no socket, no root operations out of the box. And the transition is basically seamless too.

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again and again … docker is becoming a joke