I have the same issue with latest the candidate kernel required to fix Meltdown on Xenial.
linux-hwe-edge 4.13.0-25.29~16.04.1 from ppa:canonical-kernel-team/pti
Because "the Rolling HWE kernel for Ubuntu 16.04 will go to 4.13 early, instead of also fixing 4.10 HWE kernel" I cannot stay on 4.10 and this is urgent.
I have the same issue with latest the candidate kernel required to fix Meltdown on Xenial. 25.29~16. 04.1 from ppa:canonical- kernel- team/pti
linux-hwe-edge 4.13.0-
Because "the Rolling HWE kernel for Ubuntu 16.04 will go to 4.13 early, instead of also fixing 4.10 HWE kernel" I cannot stay on 4.10 and this is urgent.