Greg Kroah-Hartman, Linux Kernel developer and maintenance manager, officially finalised today that the upcoming 4.19 branch will be a long-term support release. Currently, Linux Kernel 4.17 has ended its life cycle, and 4.18 does not have the necessary factors to become a long-term support version, so the LTSI community has discussed this with Greg Kroah-Hartman.
We have asked to GregKH. Does 4.19 will be next LTS? Answer was YES. LTS version will be end of year release. So it will be 4.19. We expected 4.20 in June but some delay happened actually.
— LinuxLTSI (@LinuxLTSI) August 29, 2018
The final answer is that the upcoming Linux 4.19 branch kernel will be a long-term support version, meaning that it will continue to support for several years after the official release. The current long-term support branches include Linux 4.14, Linux 4.9, Linux 4.4, and Linux 3.16 and Linux 3.18.
Linux Kernel 4.19 brings many improvements, including upgrade drivers, improved graphics and networking, architectural updates, core kernel and network improvements, updated file systems, and documentation and tool updates. The official version is expected to be released in mid-October 2018 (14/21), depending on how many candidate versions the branch will have, and Linus Torvalds can only determine this.