USN-3218-1: Linux kernel vulnerability

7 March 2017

linux, linux-ti-omap4 vulnerability

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

  • Ubuntu 12.04 LTS


The system could be made to crash or run programs as an administrator.

Software Description

  • linux - Linux kernel
  • linux-ti-omap4 - Linux kernel for OMAP4


Alexander Popov discovered that the N_HDLC line discipline implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges.

Update instructions

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

Ubuntu 12.04 LTS
linux-image-3.2.0-124-generic - 3.2.0-124.167
linux-image-3.2.0-124-generic-pae - 3.2.0-124.167
linux-image-3.2.0-124-highbank - 3.2.0-124.167
linux-image-3.2.0-124-omap - 3.2.0-124.167
linux-image-3.2.0-124-powerpc-smp - 3.2.0-124.167
linux-image-3.2.0-124-powerpc64-smp - 3.2.0-124.167
linux-image-3.2.0-124-virtual - 3.2.0-124.167
linux-image-3.2.0-1502-omap4 - 3.2.0-1502.129
linux-image-generic -
linux-image-generic-pae -
linux-image-highbank -
linux-image-omap -
linux-image-omap4 -
linux-image-powerpc-smp -
linux-image-powerpc64-smp -
linux-image-virtual -

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.