USN-3266-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3266-1

24th April, 2017

linux, linux-raspi2 vulnerability

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

  • Ubuntu 16.10


The system could be made to crash under certain conditions.

Software description

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


Alexander Popov discovered that a race condition existed in the Stream
Control Transmission Protocol (SCTP) implementation in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).

Update instructions

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

Ubuntu 16.10:
linux-image-4.8.0-49-generic-lpae 4.8.0-49.52
linux-image-4.8.0-1035-raspi2 4.8.0-1035.38
linux-image-4.8.0-49-lowlatency 4.8.0-49.52
linux-image-4.8.0-49-powerpc-smp 4.8.0-49.52
linux-image-4.8.0-49-powerpc-e500mc 4.8.0-49.52
linux-image-4.8.0-49-generic 4.8.0-49.52

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.