CVE-2016-1859

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-05-20 · updated 2026-06-17
Weakness: CWE-119

Description

The WebKit Canvas implementation in Apple iOS before 9.3.2, Safari before 9.1.1, and tvOS before 9.2.1 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

Affected products

Apple Iphone Os: before 9.3.2 — fixed in 9.3.2
Apple Safari: before 9.1.1 — fixed in 9.1.1
Apple tvOS: before 9.2.1 — fixed in 9.2.1
Webkitgtk+: before 2.12.1 — fixed in 2.12.1

How to fix

Upgrade to a fixed version: Apple Iphone Os 9.3.2; Apple Safari 9.1.1; Apple tvOS 9.2.1; Webkitgtk+ 2.12.1. Check the vendor advisory for mitigations.

References

http://lists.apple.com/archives/security-announce/2016/May/msg00001.html
http://lists.apple.com/archives/security-announce/2016/May/msg00002.html
http://lists.apple.com/archives/security-announce/2016/May/msg00005.html
http://packetstormsecurity.com/files/137229/WebKitGTK-Code-Execution-Denial-Of-Service-Memory-Corruption.html
http://www.securityfocus.com/archive/1/538522/100/0/threaded
http://www.securitytracker.com/id/1035888
http://www.zerodayinitiative.com/advisories/ZDI-16-352
https://support.apple.com/HT206564
https://support.apple.com/HT206565
https://support.apple.com/HT206568
http://lists.apple.com/archives/security-announce/2016/May/msg00001.html
http://lists.apple.com/archives/security-announce/2016/May/msg00002.html

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