Gentoo Linux Security Advisory GLSA 200710-07 – Reinhard Max discovered a boundary error in Tk when processing an interlaced GIF with two frames where the second is smaller than the first one. Versions less than 8.4.15-r1 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59900/glsa-200710-07.txt
Source: https://packetstormsecurity.com/files/59900/Gentoo-Linux-Security-Advisory-200710-7.html