USN-3128-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3128-1

11th November, 2016

linux vulnerability

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

Ubuntu 16.04 LTS

Summary

The system could be made to crash under certain conditions.

Software description

linux
– Linux kernel

Details

Ondrej Kozina discovered that the keyring interface in the Linux kernel
contained a buffer overflow when displaying timeout events via the
/proc/keys interface. A local attacker could use this to cause a denial of
service (system crash).

Update instructions

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

Ubuntu 16.04 LTS:: linux-image-4.4.0-47-powerpc64-emb

4.4.0-47.68; linux-image-powerpc-e500mc

4.4.0.47.50; linux-image-4.4.0-47-lowlatency

4.4.0-47.68; linux-image-4.4.0-47-powerpc64-smp

4.4.0-47.68; linux-image-4.4.0-47-generic

4.4.0-47.68; linux-image-4.4.0-47-powerpc-smp

4.4.0-47.68; linux-image-powerpc-smp

4.4.0.47.50; linux-image-generic-lpae

4.4.0.47.50; linux-image-powerpc64-emb

4.4.0.47.50; linux-image-virtual

4.4.0.47.50; linux-image-4.4.0-47-generic-lpae

4.4.0-47.68; linux-image-generic

4.4.0.47.50; linux-image-lowlatency

4.4.0.47.50; linux-image-4.4.0-47-powerpc-e500mc

4.4.0-47.68; linux-image-powerpc64-smp

4.4.0.47.50

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-2016-7042

Source: USN-3128-1: Linux kernel vulnerability

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