Status in Ubuntu: https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2...
For Ubuntu versions:
Ubuntu 12.04.3 LTS
Ubuntu 14.04.5 LTS
The following should get you patched up, you will need a reboot though: sudo apt-get update
sudo apt-get install linux-headers-3.13.0-110 linux-headers-3.13.0-110-generic linux-image-3.13.0-110-generic
After reboot: uname -a
Linux hostname 3.13.0-110-generic #157-Ubuntu
Any Digital Ocean users may need to power down their droplet and switch the kernel to the following version: DigitalOcean GrubLoader v0.2 (20160714) Ubuntu
Without this the new kernel may not be used.for example for precise the kernel ID is 7515 for the "DigitalOcean GrubLoader v0.2 (20160714) Ubuntu" kernel. If you do this be sure to double-check the id by listing the kernels using the API though. You can also do this with libcloud using 'ex_change_kernel' from the 'DigitalOcean_v2_NodeDriver'