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Ubuntu Security Notice USN-2911-1
February 22, 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 under certain conditions.
Software Description:
– linux: Linux kernel
Details:
It was discovered that the Linux kernel keyring subsystem contained a race
between read and revoke operations. 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 versions:
Ubuntu 12.04 LTS:
linux-image-3.2.0-99-generic 3.2.0-99.139
linux-image-3.2.0-99-generic-pae 3.2.0-99.139
linux-image-3.2.0-99-highbank 3.2.0-99.139
linux-image-3.2.0-99-omap 3.2.0-99.139
linux-image-3.2.0-99-powerpc-smp 3.2.0-99.139
linux-image-3.2.0-99-powerpc64-smp 3.2.0-99.139
linux-image-3.2.0-99-virtual 3.2.0-99.139
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:
http://www.ubuntu.com/usn/usn-2911-1
CVE-2015-7550
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-99.139
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