The term "Universal Linux Vulnerability" used in the disclosure of the recent Kernel LPEs is incredibly misleading and shouldn't be used. There is no such thing, as a bug that can be exploited in virtual all setups. The world of Linux systems is tremendously heterogeneous. Different kernel configs, user spaces, MACs, privilege systems. Kernel/Userspace isn't even necessarily a trust boundary. In linux-adjacent vuln research you need to be especially precise what your actual target is.