What’s Vulnerable › Vulnerabilities

CVE-2020-27899

• Severity: high (CVSS 7.8 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: 2021-04-02 · updated 2026-06-17
• Weakness: CWE-416

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, tvOS 14.2. A local attacker may be able to elevate their privileges.

Affected products

• Apple iPadOS: before 14.2 — fixed in 14.2
• Apple Iphone Os: before 14.2 — fixed in 14.2
• Apple macOS: before 11.0.1 — fixed in 11.0.1
• Apple tvOS: before 14.2 — fixed in 14.2
• Apple watchOS: before 7.1 — fixed in 7.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.2; Apple Iphone Os 14.2; Apple macOS 11.0.1; Apple tvOS 14.2; Apple watchOS 7.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT211928
• https://support.apple.com/en-us/HT211929
• https://support.apple.com/en-us/HT211930
• https://support.apple.com/en-us/HT211931
• https://support.apple.com/en-us/HT211928
• https://support.apple.com/en-us/HT211929
• https://support.apple.com/en-us/HT211930
• https://support.apple.com/en-us/HT211931

Get alerted when CVE-2020-27899 or the next vulnerability affects your stack