KDE is a feature-rich graphical desktop environment for Linux and Unix-like operating systems. start_kdeinit is a wrapper for kdeinit.
Vulnerabilities have been reported in the processing of user-controlled data by start_kdeinit, which is setuid root by default.
A local attacker could possibly execute arbitrary code with root privileges, cause a Denial of Service or send Unix signals to other processes, when start_kdeinit is setuid root.
There is no known workaround at this time.
All kdelibs users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=kde-base/kdelibs-3.5.8-r4"