Ubuntu 14.04 Is Now Using Linux Kernel 3.13 RC8

It's very likely that Ubuntu users will get the final 3.13 Linux kernel soon
by Silviu Stahie, January 15th, 2014
 

Ubuntu 14.04 LTS Makes the Switch to Linux Kernel 3.13

A new Linux kernel has been implemented in the latest version of Ubuntu 14.04
by Silviu Stahie, January 8th, 2014