Gentoo has issued an update for mysql. This fixes multiple security issues and vulnerabilities, where one has unknown impacts and others can be exploited by malicious, local users to bypass certain security restrictions and manipulate certain data, by malicious users to bypass certain security restrictions, manipulate certain data, cause a DoS (Denial of Service), gain escalated privileges, and potentially compromise a vulnerable system, and by malicious people to conduct script insertion and spoofing attacks, cause a DoS (Denial of Service), and compromise a vulnerable system.

For more information:
SA30134
SA31769
SA32072
SA35767
SA37372
SA38364
SA38390
SA39454
SA39792
SA40333
SA41048
SA41716

Solution
Update to version "dev-db/mysql-5.1.56" or later.
Original Advisory
GLSA 201201-02:
http://security.gentoo.org/glsa/glsa-201201-02.xml

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers