Secunia Security Advisory – Slackware has issued an update for libpng. This fixes multiple vulnerabilities, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise an application using the library.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/91317/sa40336.txt
Source: https://packetstormsecurity.com/files/91317/Secunia-Security-Advisory-40336.html