Freedesktop poppler 0.39.0

Heap-based buffer overflow in the ExponentialFunction::ExponentialFunction function in Poppler before 0.40.0 allows remote attackers to cause a denial of service (memory corruption and crash) or possibly execute arbitrary code via an invalid blend mode in the ExtGState dictionary in a crafted PDF document.

poppler since version 0.17.3 has been vulnerable to NULL pointer dereference in pdfunite triggered by specially crafted documents.