gpg2.exe in Gpg4win 2.0.1, as used in KDE Kleopatra 2.0.11, allows remote attackers to cause a denial of service (application crash) via a long certificate signature.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53908
https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-3777
http://www.securityfocus.com/bid/36781
http://www.packetstormsecurity.com/0910-exploits/gpg2kleo-dos.txt