Adobe Acrobat and Reader versions, 2019.012.20040 and earlier, 2017.011.30148 and earlier, 2017.011.30148 and earlier, 2015.006.30503 and earlier, and 2015.006.30503 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution .
https://helpx.adobe.com/security/products/acrobat/apsb19-49.html