CVE-2026-20637

critical

Description

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.

References

https://support.apple.com/en-us/126796

https://support.apple.com/en-us/126795

https://support.apple.com/en-us/126793

https://support.apple.com/en-us/126353

https://support.apple.com/en-us/126352

https://support.apple.com/en-us/126351

https://support.apple.com/en-us/126348

https://support.apple.com/en-us/126346

Details

Source: Mitre, NVD

Published: 2026-03-25

Updated: 2026-03-25

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical