Samsung Decides Not to Patch Kernel Vulnerabilities in Some Aging Galaxy Devices

This article refers primarily to some S4 variants needing a security update for a found vulnerability. Samsung told the source that any device sporting Lollipop will be patched, so this would only leave Jelly Bean and KitKat devices behind. The GT-I9500 has been officially updated to Lollipop, so we assume that those S4 variants will be patched as well.

source: xdadevelopers