CVE-2026-20637: A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS…

PriorityP423medium6.2CVSS 3.1

AVLACLPRNUINSUCNINAH

EPSS

0.20%

9.7th percentile

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.

Affected

20 ranges

Vendor	Product	Version range	Fixed in
apple	ios_26.3_and_ipados	—	—
apple	ios_and_ipados	< 18.7.7	18.7.7
apple	ios_and_ipados	< 26.3	26.3
apple	ipados	< 18.7.7	18.7.7
apple	ipados	>= 26.0 < 26.3	26.3
apple	iphone_os	< 18.7.7	18.7.7
apple	iphone_os	>= 26.0 < 26.3	26.3
apple	macos	< 14.8.5	14.8.5
apple	macos	< 15.7.5	15.7.5
apple	macos	< 26.3	26.3
apple	macos	>= 14.0 < 14.8.5	14.8.5
apple	macos	>= 15.0 < 15.7.5	15.7.5
apple	macos	>= 26.0 < 26.3	26.3
apple	macos_tahoe	—	—
apple	tvos	< 26.3	26.3
apple	tvos	—	—
apple	visionos	< 26.3	26.3
apple	visionos	—	—
apple	watchos	< 26.3	26.3
apple	watchos	—	—

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