The v8 flaw was discovered by security researcher Christian Holler, who was award $1,000 by Google for reporting the issue.
The Chrome Stable 15.0.874.121 update is the second security update from Google for Chrome in a week. On November 10, Google released Chrome Stable 15.0.874.120, fixing seven flaws, five marked as being high impact.
Over the short life of the Chrome 15 browser so far, Google has been very active. The first stable release of Chrome 15 came out at the end of October. The first release fixed over 27 flaws in Chrome, with Google paying out a record $26,511 in rewards to security researchers.