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==========================================================================
Ubuntu Security Notice USN-2463-1
January 13, 2015

linux vulnerabilities
==========================================================================

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

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

Update instructions:

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-75-generic    3.2.0-75.110
  linux-image-3.2.0-75-generic-pae  3.2.0-75.110
  linux-image-3.2.0-75-highbank   3.2.0-75.110
  linux-image-3.2.0-75-omap       3.2.0-75.110
  linux-image-3.2.0-75-powerpc-smp  3.2.0-75.110
  linux-image-3.2.0-75-powerpc64-smp  3.2.0-75.110
  linux-image-3.2.0-75-virtual    3.2.0-75.110

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-2463-1
  CVE-2014-7842, CVE-2014-8369

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.2.0-75.110



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