manual modprobing yes, autoloading by the kernel (e.g. by virtue of opening a socket of a certain type) no. but in recent pve-container versions, opening AF_ALG sockets is also forbidden via seccomp...
From what I gather, these modules have to either be in use, loadable through a user-level (not root) trigger, or already compiled default into the kernel to be exploitable in containers.
Doesnt the default confined apparmor profile for...