What’s Vulnerable › Vulnerabilities

CVE-2018-4371

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% 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-125

Description

An out-of-bounds read was addressed with improved input validation. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1.

Affected products

• Apple Iphone Os: before 12.1 — fixed in 12.1
• macOS: before 10.14.1 — fixed in 10.14.1
• Apple tvOS: before 12.1 — fixed in 12.1
• Apple watchOS: before 5.1 — fixed in 5.1

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.1; macOS 10.14.1; Apple tvOS 12.1; Apple watchOS 5.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/kb/HT209192
• https://support.apple.com/kb/HT209193
• https://support.apple.com/kb/HT209194
• https://support.apple.com/kb/HT209195
• https://support.apple.com/kb/HT209192
• https://support.apple.com/kb/HT209193
• https://support.apple.com/kb/HT209194
• https://support.apple.com/kb/HT209195

Get alerted when CVE-2018-4371 or the next vulnerability affects your stack