Use-after-free vulnerability in the Web Workers implementation in Google Chrome before 38.0.2125.101 allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.
http://www.securityfocus.com/bid/70273
http://rhn.redhat.com/errata/RHSA-2014-1626.html
http://googlechromereleases.blogspot.com/2014/10/stable-channel-update.html