ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-49 and 7.1.2-24, an infinite loop in the subimage-search operation can happen when using a crafted image. This issue has been patched in versions 6.9.13-49 and 7.1.2-24.
https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-5v62-8fq6-cp9m