Ubuntu 24.04.1 is still available, but currently you can't update to it from Jammy Jellyfish until a bug is sorted. As compensation, there will be some fun treats on 24.10.

A few days ago The Reg wrote that Noble Numbat upgrades for 22.04 were available, but we mentioned a number of bugs affecting some users reported on various forums. No longer. The upgraded version has been removed from the https://changelogs.ubuntu.com/meta-release-lts file on Canonical's website, meaning that machines running 22.04 will not be offered as an upgrade at this time.

Official confirmation from Canonical comes in the form of a terse email, saying it has been withdrawn "due to a critical bug in the ubuntu-release-upgrader in how it uses the apt resolver. This is working on and as soon as this is fixed, we will re-enable the upgrades."

We wrote about improvements to the APT solver last May and can't help but wonder if there is some connection here. The email adds: "We are also working on an announcement post/email so people are aware."