CVE-2020-27930: Apple Multiple Products Memory Corruption Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2021-11-03
EPSS: 22.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-08 · updated 2026-06-17
Weakness: CWE-787

Description

A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. Processing a maliciously crafted font may lead to arbitrary code execution.

Affected products

Apple iPadOS: before 14.2 — fixed in 14.2
Apple Iphone Os: before 12.4.9; from 14.0 before 14.2 — fixed in 12.4.9, 14.2
macOS: before 10.15.7 — fixed in 10.15.7
Apple macOS: from 11.0 before 11.0.1 — fixed in 11.0.1
Apple watchOS: before 5.3.9; from 6.0 before 6.2.9; from 7.0 before 7.1 — fixed in 5.3.9, 6.2.9, 7.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.2; Apple Iphone Os 12.4.9, 14.2; macOS 10.15.7; Apple macOS 11.0.1; Apple watchOS 5.3.9, 6.2.9, 7.1. Check the vendor advisory for mitigations.

References

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