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:

Ubuntu 15.04

Summary

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

Software description

linux
– Linux kernel

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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