In October 2017, the Linux kernel team agreed to extend the next version of Linux’s Long Term Support (LTS) from two years to six years, Linux 4.14. This helps Android, embedded Linux, and Linux Internet of Things (IoT) developers. But this move did not mean all future Linux LTS versions will have a six-year lifespan.
As Konstantin Ryabitsev, The Linux Foundation‘s director of IT infrastructure security, explained in a Google+ post, “Despite what various news sites out there may have told you, kernel 4.14 LTS is not planned to be supported for 6 years. Just because Greg Kroah-Hartman is doing it for 4.4 does not mean that all LTS kernels from now on are going to be maintained for that long.”
Read more at ZDNet