[USN-3107-1] Linux kernel vulnerability

Steve Beattie steve.beattie at canonical.com
Thu Oct 20 02:42:58 UTC 2016


==========================================================================
Ubuntu Security Notice USN-3107-1
October 20, 2016

linux vulnerability
==========================================================================

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

- Ubuntu 16.10

Summary:

The system could be made to run programs as an administrator.

Software Description:
- linux: Linux kernel

Details:

It was discovered that a race condition existed in the memory manager of
the Linux kernel when handling copy-on-write breakage of private read-only
memory mappings. A local attacker could use this to gain administrative
privileges.

Update instructions:

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

Ubuntu 16.10:
  linux-image-4.8.0-26-generic    4.8.0-26.28
  linux-image-4.8.0-26-generic-lpae  4.8.0-26.28
  linux-image-4.8.0-26-lowlatency  4.8.0-26.28
  linux-image-4.8.0-26-powerpc-e500mc  4.8.0-26.28
  linux-image-4.8.0-26-powerpc-smp  4.8.0-26.28
  linux-image-4.8.0-26-powerpc64-emb  4.8.0-26.28

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:
  http://www.ubuntu.com/usn/usn-3107-1
  CVE-2016-5195

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.8.0-26.28

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