USN-2731-1: Linux kernel vulnerability

Ubuntu Security Notice USN-2731-1

3rd September, 2015

linux vulnerability

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

  • Ubuntu 12.04 LTS


The system could be made to expose sensitive information.

Software description

  • linux - Linux kernel


Benjamin Randazzo discovered an information leak in the md (multiple
device) driver when the bitmap_info.file is disabled. A local privileged
attacker could use this to obtain sensitive information from the kernel.

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-90-powerpc64-smp 3.2.0-90.128
linux-image-3.2.0-90-powerpc-smp 3.2.0-90.128
linux-image-3.2.0-90-generic-pae 3.2.0-90.128
linux-image-3.2.0-90-virtual 3.2.0-90.128
linux-image-3.2.0-90-highbank 3.2.0-90.128
linux-image-3.2.0-90-omap 3.2.0-90.128
linux-image-3.2.0-90-generic 3.2.0-90.128

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.