Comment 6 for bug 1959993

In general, it's indeed a problem for such cases, though there are a few mitigating factors here:

 - This would only be a problem for those who upgrade from focal to impish. My understanding is that there is no direct upgrade path to achieve this, you'd need to go throughgroovy and hirsute, both of which are EOL, so I wouldn't really expect many/any user to do this.

 - The LXC team is responsible for self-assigning CVEs and preparing LXC security updates (~ubuntu-lxc-security). In such cases we usually prefer releasing a new upstream bugfix release (LXC 4.0.x is an LTS with a 5 years security commitment upstream) and then upload that to the -security pockets where applicable. So in that case, we'd bump jammy to match focal, saving us some effort on validating the security update by making things be identical on all releases shipping 4.0.x (jammy will be on 5.0.x).

That's generally how we've handled those micro release updates and so far haven't run into any problems but I'm also not necessarily against uploading the exact same source package as focal to impish, the preparation time would be pretty minimal, it's mostly on the review and testing side of things that things can increase significantly especially as we usually struggle to find users on non-LTS to perform more than a simple install/upgrade test.