Ubuntu Security Notice 947-2 – USN-947-1 fixed vulnerabilities in the Linux kernel. Fixes for CVE-2010-0419 caused failures when using KVM in certain situations. This update reverts that fix until a better solution can be found.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/90307/USN-947-2.txt
Source: https://packetstormsecurity.com/files/90307/Ubuntu-Security-Notice-947-2.html