This update for SDL_image fixes the following issues:
CVE-2017-14442: A specially crafted BMP image could have caused a stack overflow for an attacker that can display a specially crafted image (bsc#1084304).
CVE-2017-14450: A specially crafted GIF image could have caused a buffer overflow on a global section for an attacker that can display an image (bsc#1084288).
CVE-2017-12122: An exploitable code execution vulnerability exists in the ILBM image rendering functionality. A specially crafted ILBM image can cause a heap overflow resulting in code execution. (bsc#1084256).
CVE-2017-14440: An exploitable code execution vulnerability exists in the ILBM image rendering functionality. A specially crafted ILBM image can cause a stack overflow resulting in code execution. (bsc#1084257).
CVE-2017-14448: An exploitable code execution vulnerability exists in the XCF image rendering functionality. 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. (bsc#1084303).
CVE-2018-3839: An exploitable code execution vulnerability exists in the XCF image rendering functionality. A specially crafted XCF image can cause an out-of-bounds write on the heap, resulting in code execution. (bsc#1089087).