Ubuntu Security Notice USN-2074-1
http://packetstormsecurity.com/files/124655/USN-2074-1.txt
Ubuntu Security Notice 2074-1 - Dave Jones and Vince Weaver reported a flaw in the Linux kernel's per event subsystem that allows normal users to enable function tracing. An unprivileged local user could exploit this flaw to obtain potentially sensitive information from the kernel. Stephan Mueller reported an error in the Linux kernel's ansi cprng random number generator. This flaw makes it easier for a local attacker to break cryptographic protections. Various other issues were also addressed.