From ${URL} : there is a memory read out of bound in libpng 1.2.* and 1.4.* , which is used in many operate systems and applications. it may leak information in the application . this bug has been accepted and fixed in LIBPNG : http://sourceforge.net/p/libpng/bugs/241/ @maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
This issue was resolved and addressed in GLSA 201611-08 at https://security.gentoo.org/glsa/201611-08 by GLSA coordinator Aaron Bauman (b-man).