(requoted from https://www.gimp.org/news/2017/05/11/gi ... -released/)
We are releasing GIMP 2.8.22 with various bug fixes.
All platforms will benefit from a change to the image window hierarchy in single window mode, which improves painting performance when certain GTK+ themes are used.
This version fixes an ancient CVE bug, CVE-2007-3126. Due to this bug, the ICO file import plug-in could be crashed by specially crafted image files. Our attempts to reproduce the bug failed with 2.8 and thus the impact had likely been minimal for years, but now it is gone for good.