4.9 - USN-3443-3

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-gcp: Linux kernel for Google Cloud Platform (GCP) systems

Details:

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.10.0-1007-gcp 4.10.0-1007.7
linux-image-gcp 4.10.0.1007.9

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:
https://www.ubuntu.com/usn/usn-3443-3
https://www.ubuntu.com/usn/usn-3443-1
CVE-2017-14106

Package Information:
https://launchpad.net/ubuntu/+source/linux-gcp/4.10.0-1007.7