FreeBSD Security Advisory FreeBSD-SA-02:18 - A programming error in zlib may cause segments of dynamically allocated memory to be released more than once (double-freed), allowing attackers to send specially crafted data to applications that use zlib, crashing the application.
85e35fe5255d89e2e7899a233f71d3e506322b0209fc2a63fdfa86524f863db8