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Ubuntu Security Notice USN-2731-1
September 03, 2015

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

– Ubuntu 12.04 LTS

Summary:

The system could be made to expose sensitive information.

Software Description:
– linux: Linux kernel

Details:

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 versions:

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

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.

References:
http://www.ubuntu.com/usn/usn-2731-1
CVE-2015-5697

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-90.128

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