Ubuntu Security Notice 969-1 – It was discovered that the PC/SC service did not correctly handle malformed messages. A local attacker could exploit this to execute arbitrary code with root privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92513/USN-969-1.txt
Source: https://packetstormsecurity.com/files/92513/Ubuntu-Security-Notice-969-1.html