CVE-2026-20644

MEDIUM

macOS Tahoe <26.3 - Memory Corruption

Title source: llm
STIX 2.1

Description

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.

References (19)

Core 19
Core References
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126346
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126347
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126348
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126353
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126354

Scores

CVSS v3 6.5
EPSS 0.0029
EPSS Percentile 21.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-119 CWE-120 CWE-416 CWE-787
Status published
Products (10)
Apple/iOS and iPadOS < 18.7.5
Apple/iOS and iPadOS < 26.3
apple/ipados < 18.7.5
apple/iphone_os < 18.7.5
apple/macos < 26.3
Apple/macOS < 26.3
apple/safari < 26.3
Apple/Safari < 26.3
apple/visionos < 26.3
Apple/visionOS < 26.3
Published Feb 11, 2026
Tracked Since Feb 18, 2026