Multiple unspecified vulnerabilities in Google V8 before 4.7.80.23, as used in Google Chrome before 47.0.2526.73, allow attackers to cause a denial of service or possibly have other impact via unknown vectors.
http://www.ubuntu.com/usn/USN-2825-1
http://googlechromereleases.blogspot.com/2015/12/stable-channel-update.html