The latest version of this kernel can be downloaded from Softpedia
The first update for the stable Linux kernel 3.13 has been announced by Greg Kroah-Hartman just a few minutes ago, starting the maintenance cycle for this new branch.The latest version of this kernel branch has received its first update, but it's a small one with just a few changes and fixes. This is normal for a new kernel, and subsequent versions should pick up the pace.
“I'm announcing the release of the 3.13.1 kernel. All users of the 3.13 kernel series must upgrade.”
“The updated 3.13.y git tree can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-3.13.y and can be browsed at the normal kernel.org git web browser: http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary,” Greg Kroah-Hartman said in the email announcement.
If you are using the first release in the Linux kernel 3.13.x branch, you should consider an update to this build.
A complete list of commits in this branch of the kernel can be found in the official announcement. Download Linux kernel 3.13.1 right now from Softpedia.