USN-2911-1: Linux kernel vulnerability
Ubuntu Security Notice USN-2911-1
22nd February, 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 version:
- Ubuntu 12.04 LTS:
-
linux-image-3.2.0-99-generic-pae
3.2.0-99.139
-
linux-image-3.2.0-99-powerpc64-smp
3.2.0-99.139
-
linux-image-3.2.0-99-generic
3.2.0-99.139
-
linux-image-3.2.0-99-virtual
3.2.0-99.139
-
linux-image-3.2.0-99-highbank
3.2.0-99.139
-
linux-image-3.2.0-99-powerpc-smp
3.2.0-99.139
-
linux-image-3.2.0-99-omap
3.2.0-99.139
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
Source: USN-2911-1: Linux kernel vulnerability
