Ubuntu Security Notice 558-1 – A slew of vulnerabilities have been addressed for the linux-source-2.6.17/20/22 packages.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/61952/USN-558-1.txt
Source: https://packetstormsecurity.com/files/61952/Ubuntu-Security-Notice-558-1.html