RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.4, Linux RealPlayer 11.0.2.1744, and possibly HelixPlayer 1.0.6 and other versions, allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted RealMedia video file.
http://www.securitytracker.com/id?1024861
http://www.redhat.com/support/errata/RHSA-2010-0981.html
http://service.real.com/realplayer/security/12102010_player/en/
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=883