Gentoo Linux Security Advisory GLSA 200510-18 – RedHat reported that pnmtopng is vulnerable to a buffer overflow. Versions less than 10.29 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40910/glsa-200510-18.txt
Source: https://packetstormsecurity.com/files/40910/Gentoo-Linux-Security-Advisory-200510-18.html