RealPlayer is a multimedia player capable of handling multiple multimedia file formats.
RealPlayer is vulnerable to a buffer overflow when processing malicious SWF files.
By enticing a user to open a specially crafted SWF file an attacker could execute arbitrary code with the permissions of the user running the application.
There is no known workaround at this time.
All RealPlayer users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-video/realplayer-10.0.7"