Ubuntu Update for libpng USN-1417-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-1417-1
Solution
Please Install the Updated Packages.
Insight
It was discovered that libpng incorrectly handled certain memory operations. If a user or automated system using libpng were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or execute code with the privileges of the user invoking the program.
Affected
libpng on Ubuntu 11.10 , Ubuntu 11.04 , Ubuntu 10.10 , Ubuntu 10.04 LTS , Ubuntu 8.04 LTS