CVE-2026-20620

HIGH

macOS < 14.8.4, < 15.7.4, < 26.3 - Out-of-bounds Read

Title source: llm
STIX 2.1

Description

An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An attacker may be able to cause unexpected system termination or read kernel memory.

References (3)

Core 3
Core References
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126348
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126349
Release Notes, Vendor Advisory
https://support.apple.com/en-us/126350

Scores

CVSS v3 7.7
EPSS 0.0020
EPSS Percentile 9.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (4)
Apple/macOS < 14.8.4
Apple/macOS < 15.7.4
Apple/macOS < 26.3
apple/macos 14.0 - 14.8.4
Published Feb 11, 2026
Tracked Since Feb 18, 2026