The Page destructor in Page.cc in libpoppler in Poppler 0.8.4 and earlier deletes a pageWidgets object even if it is not initialized by a Page constructor, which allows remote attackers to execute arbitrary code via a crafted PDF document.
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.