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USN-2871-1: Linux kernel vulnerability

Ubuntu Security Notice USN-2871-1

19th January, 2016

linux vulnerability

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

Summary

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

Software description

Details

Yevgeny Pats discovered that the session keyring implementation in the
Linux kernel did not properly reference count when joining an existing
session keyring. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code with
administrative privileges.

Update instructions

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

Ubuntu 15.04:
linux-image-3.19.0-47-powerpc-e500mc

3.19.0-47.53
linux-image-3.19.0-47-powerpc64-emb

3.19.0-47.53
linux-image-3.19.0-47-powerpc-smp

3.19.0-47.53
linux-image-3.19.0-47-powerpc64-smp

3.19.0-47.53
linux-image-3.19.0-47-lowlatency

3.19.0-47.53
linux-image-3.19.0-47-generic

3.19.0-47.53
linux-image-3.19.0-47-generic-lpae

3.19.0-47.53

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2016-0728

Source: ubuntu-usn

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