CVE-2010-0825 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-0825): lib-src/movemail.c in movemail in emacs 22 and 23 allows local users to read, modify, or delete arbitrary mailbox files via a symlink attack, related to improper file-permission checks.
Since none of the Emacs ebuilds installs the movemail program with a setuid or setgid bit, we are not affected. See also Redhat's statement at NVD.