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. https://crbug.com/401115 External References: http://googlechromereleases.blogspot.com/2014/10/stable-channel-update.html
Upstream bug is close, there does not seem to be any details available for this flaw. It's currently unclear if this may affect any WebKit version.
This issue has been addressed in the following products: Supplementary for Red Hat Enterprise Linux 6 Via RHSA-2014:1626 https://rhn.redhat.com/errata/RHSA-2014-1626.html
Upstream commit: http://src.chromium.org/viewvc/blink?view=revision&revision=182647