Ubuntu Security Notice 451-1 – The kernel key management code did not correctly handle key reuse. A local attacker could create many key requests, leading to a denial of service. The kernel NFS code did not correctly validate NFSACL2 ACCESS requests. If a system was serving NFS mounts, a remote attacker could send a specially crafted packet, leading to a denial of service. When dumping core, the kernel did not correctly handle PT_INTERP processes. A local attacker could create situations where they could read the contents of otherwise unreadable executable programs.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55840/USN-451-1.txt
Source: https://packetstormsecurity.com/files/55840/Ubuntu-Security-Notice-451-1.html