As discussed on the Bugzilla developers mailing list/newsgroup and confirmed by project leads, Bugzilla’s new release policy is to end-of-life the oldest supported major version four months after a new major release. Since this is the first time we’re enacting this policy, we’ve extended the date to be 4 months from today rather than from Bugzilla 5.0’s exact release date (July 7th).
Thus Bugzilla 4.2 will be end-of-lifed on 30 November 2015. This means no fixes of any kind will be issued for Bugzilla 4.2 from that date onwards. As usual, all Bugzilla admins are encouraged to upgrade to the latest version of Bugzilla as soon as possible, especially those running 4.2 or earlier.
To expand a bit further on our new EOL process, after a new major release, we will support three major releases (including the new one) for four months. After four months, we will drop support for the oldest one. We will continue to support the remaining two until four months after the next release.
For example, currently we support 4.2, 4.4, and 5.0. In four months’ time we will drop support for 4.2 and support only 4.4 and 5.0. When the next major version comes out, perhaps 5.2*, we will support 4.4, 5.0, and 5.2. Four months later, we will drop support for 4.4 and support only 5.0 and 5.2.
Assistant Project Lead, Bugzilla
* It may be 6.0 if there are major and/or breaking changes.