CVE-2016-4622

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 20.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-07-22 · updated 2026-06-17
Weakness: CWE-119

Description

WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, a different vulnerability than CVE-2016-4589, CVE-2016-4623, and CVE-2016-4624.

Affected products

Apple Iphone Os: before 9.3.3 — fixed in 9.3.3
Apple Safari: before 9.1.2 — fixed in 9.1.2
Apple tvOS: before 9.2.2 — fixed in 9.2.2

How to fix

Upgrade to a fixed version: Apple Iphone Os 9.3.3; Apple Safari 9.1.2; Apple tvOS 9.2.2. Check the vendor advisory for mitigations.

References

http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
http://www.securityfocus.com/archive/1/539295/100/0/threaded
http://www.securityfocus.com/bid/91830
http://www.securitytracker.com/id/1036343
http://www.zerodayinitiative.com/advisories/ZDI-16-485
http://www.zerodayinitiative.com/advisories/ZDI-16-486
https://support.apple.com/HT206900
https://support.apple.com/HT206902
https://support.apple.com/HT206905

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