Debian development team has released a security update for 8.5 version, which armours Linux core in Debian.
This update solves a very important vulnerability related to Linux Kernel, that opened the door to other machines to leak into TCP/IP protocol. The hacker could see everything the user did in the Internet and also insert malicious messages inside this protocol.
The update is available in Debian repositories and it is highly recommended to update this operating system to the latest version to avoid possible future attacks.
Source: Linux Adictos