USN-3404-1: Linux kernel vulnerability

28 August 2017

linux, linux-raspi2 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.04


The system could be made to crash under certain conditions.

Software Description

  • linux - Linux kernel
  • linux-raspi2 - Linux kernel for Raspberry Pi 2


A reference count bug was discovered in the Linux kernel ipx protocol stack. A local attacker could exploit this flaw to cause a denial of service or possibly other unspecified problems.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 17.04
linux-image-4.10.0-1016-raspi2 - 4.10.0-1016.19
linux-image-4.10.0-33-generic - 4.10.0-33.37
linux-image-4.10.0-33-generic-lpae - 4.10.0-33.37
linux-image-4.10.0-33-lowlatency - 4.10.0-33.37
linux-image-generic -
linux-image-generic-lpae -
linux-image-lowlatency -
linux-image-raspi2 -

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.