USN-2911-1: Linux kernel vulnerability
22 February 2016
The system could be made to crash under certain conditions.
Releases
Packages
- 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
-
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-highbank
-
3.2.0-99.139
-
linux-image-3.2.0-99-virtual
-
3.2.0-99.139
-
linux-image-3.2.0-99-generic
-
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
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.