In ytnef 1.9.3, the TNEFSubjectHandler function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a double free which can be triggered via a crafted file.Referenceshttps://bugzilla.redhat.com/show_bug.cgi?id=1926967https://github.com/Yeraze/ytnef/issues/85
