Fedora Project usually provides updates for each Fedora Linux release until a month after the second succeeding version of the operating system is released. Fedora 25 received thirteen months of support, and now that Fedora 27 Linux is out as of November 14, 2017, users need to upgrade. Fedora 25 will no longer receive any software updates or security patches, which means that it will soon become a vulnerable operating system to all sort of attacks, so it is highly recommended that you upgrade to a supported release as soon as possible after reading this article.