What’s Vulnerable › Vulnerabilities

CVE-2018-4448

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-27 · updated 2026-06-17

Description

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra, iOS 12.1.1, watchOS 5.1.2, macOS Mojave 10.14.2, Security Update 2018-003 High Sierra, Security Update 2018-006 Sierra, tvOS 12.1.1. A local user may be able to read kernel memory.

Affected products

• Apple Iphone Os: before 12.1.1 — fixed in 12.1.1
• macOS: from 10.12.6 before 10.14.4; from 10.13.6 before 10.14.2 — fixed in 10.14.2, 10.14.4
• 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 12.1.1; macOS 10.14.2, 10.14.4; Apple tvOS 12.1.1; Apple watchOS 5.1.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT209340
• https://support.apple.com/en-us/HT209341
• https://support.apple.com/en-us/HT209342
• https://support.apple.com/en-us/HT209343
• https://support.apple.com/en-us/HT209600
• https://support.apple.com/en-us/HT209340
• https://support.apple.com/en-us/HT209341
• https://support.apple.com/en-us/HT209342
• https://support.apple.com/en-us/HT209343
• https://support.apple.com/en-us/HT209600

Get alerted when CVE-2018-4448 or the next vulnerability affects your stack