USN-2928-1: Linux kernel vulnerability

Ubuntu Security Notice USN-2928-1

14th March, 2016

linux vulnerability

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

• Ubuntu 12.04 LTS

Summary

The system could be made to crash or run programs as an administrator by someone with physical access.

Software description

• linux - Linux kernel

Details

Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly
performed a double-free. A local attacker with physical access could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code with administrative privileges.

Update instructions

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

Ubuntu 12.04 LTS:

linux-image-3.2.0-101-omap 3.2.0-101.141

linux-image-3.2.0-101-powerpc64-smp 3.2.0-101.141

linux-image-3.2.0-101-highbank 3.2.0-101.141

linux-image-3.2.0-101-powerpc-smp 3.2.0-101.141

linux-image-3.2.0-101-generic 3.2.0-101.141

linux-image-3.2.0-101-virtual 3.2.0-101.141

linux-image-3.2.0-101-generic-pae 3.2.0-101.141

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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.

References

CVE-2016-2384