An exploitable code execution vulnerability exists in the XCF image rendering functionality of SDL2_image-2.0.3. A specially crafted XCF image can cause a heap overflow, resulting in code execution. An attacker can display a specially crafted image to trigger this vulnerability.
https://usn.ubuntu.com/4238-1/
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0645
https://security.gentoo.org/glsa/201903-17
https://lists.debian.org/debian-lts-announce/2019/07/msg00026.html
https://lists.debian.org/debian-lts-announce/2019/07/msg00021.html