What’s Vulnerable › Vulnerabilities

CVE-2016-4774

• Severity: high (CVSS 7.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-09-25 · updated 2026-06-17
• Weakness: CWE-125

Description

The kernel in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3 allows attackers to obtain sensitive memory-layout information or cause a denial of service (out-of-bounds read) via a crafted app, a different vulnerability than CVE-2016-4773 and CVE-2016-4776.

Affected products

• Apple Iphone Os: before 10.0 — fixed in 10.0
• macOS: before 10.12.0 — fixed in 10.12.0
• Apple tvOS: before 10.0 — fixed in 10.0
• Apple watchOS: before 3.0 — fixed in 3.0

How to fix

Upgrade to a fixed version: Apple Iphone Os 10.0; macOS 10.12.0; Apple tvOS 10.0; Apple watchOS 3.0. Check the vendor advisory for mitigations.

References

• http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
• http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html
• http://lists.apple.com/archives/security-announce/2016/Sep/msg00010.html
• http://lists.apple.com/archives/security-announce/2016/Sep/msg00011.html
• http://www.securityfocus.com/bid/93054
• http://www.securitytracker.com/id/1036858
• https://support.apple.com/HT207141
• https://support.apple.com/HT207142
• https://support.apple.com/HT207143
• https://support.apple.com/HT207170
• http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
• http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html

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