Integer overflow in libpng, as used in Google Chrome before 17.0.963.56, allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors that trigger an integer truncation.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15032
http://support.apple.com/kb/HT5503
http://support.apple.com/kb/HT5501
http://security.gentoo.org/glsa/glsa-201206-15.xml
http://secunia.com/advisories/49660
http://secunia.com/advisories/48110
http://secunia.com/advisories/48016
http://lists.opensuse.org/opensuse-security-announce/2012-02/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2012-02/msg00020.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html
http://googlechromereleases.blogspot.com/2012/02/chrome-stable-update.html