I am using a Ubuntu 16.04 system and somehow ended up with the kernel 4.10 on my system. I researched this with
uname -a which output was
Linux blackbox-H97-D3H 4.10.0-42-generic #46~16.04.1-Ubuntu SMP Mon Dec 4 15:57:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
After some research I found out that 16.04 on default runs with Linux 4.4, but some people have 4.10 like me. Note: I installed it march '17 and I heared some people talking about newer ISOS coming with this kernel. (but why should they if those kernel is not going to be supportet after the end of life for 17.04?)
So my first question is: How did this happen, because I can not remember upgrading the system and I can not imagine apt to install newer kernels and should I not be on 4.13 if it did? Can you tell me how this might have happend.
And then the second part of my question: According to this if 4.10 Kernel is not beeing patched for Meltdown and Spectre so should I rather upgrade to 4.13, downgrade to 4.4 as it appears that most PCs on 16.04 are running on this kernel, or do nothing (why ever one should do that)?