Ubuntu Security Notice 972-1 – It was discovered that FreeType did not correctly handle certain malformed font files. If a user were tricked into using a specially crafted font file, a remote attacker could cause FreeType to crash or possibly execute arbitrary code with user privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92842/USN-972-1.txt
Source: https://packetstormsecurity.com/files/92842/Ubuntu-Security-Notice-972-1.html