In the GetOpenCLCachedFilesDirectory function in magick/opencl.c in ImageMagick 7.0.7, a NULL pointer dereference vulnerability occurs because a memory allocation result is not checked, related to GetOpenCLCacheDirectory.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-18209.json"