[netheril96]

You are misinterpreting my goal here. I have patched my kernel against copy fail but I am thinking of ways to harden my setup against future CVEs in the kernel.

So the question is, before I learned about copy fail, what could I have done that would have limited the possible damage this vulnerability could do to me? CapabilityBoundingSet is one answer and rootless podman as mentioned in this article is another. They don’t prevent all but at least `su` is useless.

[cpach]

If so, I would look into applying a decent seccomp profile.

Other hardening solutions could be to run the workloads inside of a VM such as Firecracker, or gVisor. But that might be more work to implement compared to seccomp.