The lesson here being... compile your own kernel from git sources every few days?
Give up entirely on non-virtualized container security?
This is not sarcasm. I'd finally given in and started learning about docker/podman-style OCI containerization last week.
are you sure containerization would be more secure? this is also a rootless podman escape. the lesson here is to not give random people shell access to your systems.
in this specific case, they offer an alternative mitigation if your chosen distro has not updated yet:
For immediate mitigation, block AF_ALG socket creation via seccomp or blacklist the algif_aead module: