From Mageia wiki
Support policy
Releases are usually supported for at least 18 months.
The lifecycle information is publicly displayed on our main page, under the support tab at http://www.mageia.org/support/#lifecycle
Supported products
Update Advisories for supported releases are available at http://advisories.mageia.org/
Mageia 6 (released 07/2017, supported until 3 months after Mageia 7)
Unsupported products
Mageia 5 (released 06/2015, supported until 12/2016)
Mageia 4 (released 02/2014, supported until 09/2015)
Mageia 3 (released 05/2013, supported until 11/2014)
Mageia 2 (released 05/2012, supported until 11/2013)
Mageia 1 (released 06/2011, supported until 12/2012)
Other info
This page still need more work, please look in our Policies review for more information