Opera before 9.51 does not properly manage memory within functions supporting the CANVAS element, which allows remote attackers to read uninitialized memory contents by using JavaScript to read a canvas image.
lists.opensuse.org/opensuse-security-announce/2008-08/msg00001.html
secunia.com/advisories/30935
secunia.com/advisories/31339
www.opera.com/docs/changelogs/freebsd/951/
www.opera.com/docs/changelogs/linux/951/
www.opera.com/docs/changelogs/mac/951/
www.opera.com/docs/changelogs/solaris/951/
www.opera.com/docs/changelogs/windows/951/
www.opera.com/support/search/view/887/
www.securityfocus.com/bid/30068
www.vupen.com/english/advisories/2008/1997/references
exchange.xforce.ibmcloud.com/vulnerabilities/43575