What’s Vulnerable › Vulnerabilities

CVE-2018-4427

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-03 · updated 2026-06-17
• Weakness: CWE-119

Description

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to: iOS 12.1, watchOS 5.1.2, tvOS 12.1.1, macOS High Sierra 10.13.6 Security Update 2018-003 High Sierra, macOS Sierra 10.12.6 Security Update 2018-006.

Affected products

• Apple Iphone Os: before 12.1 — fixed in 12.1
• macOS: before 10.14.2 — fixed in 10.14.2
• Apple tvOS: before 12.1.1 — fixed in 12.1.1
• Apple watchOS: before 5.1.2 — fixed in 5.1.2

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.1; macOS 10.14.2; Apple tvOS 12.1.1; Apple watchOS 5.1.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/kb/HT209192
• https://support.apple.com/kb/HT209341
• https://support.apple.com/kb/HT209342
• https://support.apple.com/kb/HT209343
• https://support.apple.com/kb/HT209192
• https://support.apple.com/kb/HT209341
• https://support.apple.com/kb/HT209342
• https://support.apple.com/kb/HT209343

Get alerted when CVE-2018-4427 or the next vulnerability affects your stack