USN-3187-1: Linux kernel vulnerabilities

3 February 2017

linux vulnerabilities

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

  • Ubuntu 12.04 LTS


Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel


Andrey Konovalov discovered that the SCTP implementation in the Linux kernel improperly handled validation of incoming data. A remote attacker could use this to cause a denial of service (system crash). (CVE-2016-9555)

It was discovered that multiple memory leaks existed in the XFS implementation in the Linux kernel. A local attacker could use this to cause a denial of service (memory consumption). (CVE-2016-9685)

Update instructions

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

Ubuntu 12.04 LTS
linux-image-3.2.0-121-generic - 3.2.0-121.164
linux-image-3.2.0-121-generic-pae - 3.2.0-121.164
linux-image-3.2.0-121-highbank - 3.2.0-121.164
linux-image-3.2.0-121-omap - 3.2.0-121.164
linux-image-3.2.0-121-powerpc-smp - 3.2.0-121.164
linux-image-3.2.0-121-powerpc64-smp - 3.2.0-121.164
linux-image-3.2.0-121-virtual - 3.2.0-121.164
linux-image-generic -
linux-image-generic-pae -
linux-image-highbank -
linux-image-omap -
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.