Package        : linux-latest-4.9
Version        : 80+deb9u5~deb8u1

Linux 4.9 has been packaged for Debian 8 as linux-4.9.  This provides
a supported upgrade path for systems that currently use kernel
packages from the "jessie-backports" suite.

However, "apt full-upgrade" will *not* automatically install the
updated kernel packages.  You should explicitly install one of the
following metapackages first, as appropriate for your system:

    linux-image-4.9-686
    linux-image-4.9-686-pae
    linux-image-4.9-amd64
    linux-image-4.9-armmp
    linux-image-4.9-armmp-lpae
    linux-image-4.9-marvell

For example, if the command "uname -r" currently shows
"4.9.0-0.bpo.6-amd64", you should install linux-image-4.9-amd64.

There is no need to upgrade systems using Linux 3.16, as that kernel
version will also continue to be supported in the LTS period.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

-- 
Ben Hutchings - Debian developer, member of kernel, installer and LTS teams