WebKit, as used in Apple iOS before 4.3, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site, a different vulnerability than other CVEs listed in APPLE-SA-2011-03-09-1.
https://exchange.xforce.ibmcloud.com/vulnerabilities/66007
http://www.securityfocus.com/bid/46807
http://support.apple.com/kb/HT4564
http://lists.apple.com/archives/security-announce/2011//Mar/msg00003.html