Jenkins Enterprise LTS has reached EOL. Now what?
CloudBees offers support for a particular LTS branch for 9 months after the LTS support expires (for a total of 1 year). For the lifetime of the release, all release updates are available for that particular branch through the Jenkins Enterprise Update Center. We, infact run parallel update centers for each of the Jenkins LTS branch that is supported.
Once a particular LTS reaches EOL, we stop pushing updates on this particular update center. You can still use the LTS as long as you want except, there will be no more fixes pushed for this LTS version.
You are encouraged to move to the latest LTS version supported by CloudBees.