Ubuntu Security Notice USN-693-1 – It was discovered that certain gamma operations in lcms were not correctly bounds-checked. If a user or automated system were tricked into processing a malicious image, a remote attacker could crash applications linked against liblcms1, leading to a denial of service, or possibly execute arbitrary code with user privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/73170/USN-693-1.txt
Source: https://packetstormsecurity.com/files/73170/Ubuntu-Security-Notice-693-1.html