An exploitable information vulnerability exists in the XCF image rendering functionality of Simple DirectMedia Layer SDL2_image-2.0.2. A specially crafted XCF image can cause an out-of-bounds read on the heap, resulting in information disclosure. An attacker can display a specially crafted image to trigger this vulnerability.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0520
https://www.debian.org/security/2018/dsa-4184