USN-3404-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3404-1

28th 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 version:

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

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.