What’s Vulnerable › Vulnerabilities

CVE-2020-3919

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-01 · updated 2026-06-17
• Weakness: CWE-665

Description

A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2. A malicious application may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple iPadOS: before 13.4 — fixed in 13.4
• Apple Iphone Os: before 13.4 — fixed in 13.4
• macOS: before 10.15.4 — fixed in 10.15.4
• Apple tvOS: before 13.4 — fixed in 13.4
• Apple watchOS: before 6.2 — fixed in 6.2

How to fix

Upgrade to a fixed version: Apple iPadOS 13.4; Apple Iphone Os 13.4; macOS 10.15.4; Apple tvOS 13.4; Apple watchOS 6.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/HT211100
• https://support.apple.com/HT211101
• https://support.apple.com/HT211102
• https://support.apple.com/HT211103
• https://support.apple.com/HT211100
• https://support.apple.com/HT211101
• https://support.apple.com/HT211102
• https://support.apple.com/HT211103

Get alerted when CVE-2020-3919 or the next vulnerability affects your stack