CVE-2026-64727 | A type confusion issue was addressed with improved memory ha… | CVSS 9.8 CRITICAL

Description

A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.6, tvOS 26.6. An app may be able to cause unexpected system termination.

Metadata

CVE ID: CVE-2026-64727
State: PUBLISHED
Assigner: apple
Reserved: 2026-07-20 18:09 UTC
Published: 2026-07-27 20:13 UTC
Last updated: 2026-07-28 18:50 UTC
Primary CWE: CWE-843
CWE-843 Access of Resource Using Incompatible Type ('Type Co…
Vendor / Product: Apple / macOS
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (2)

Vendor	Product	Platform	Versions
Apple	macOS	—	0 < 26.6
Apple	tvOS	—	0 < 26.6

Weakness (CWE)

CWE	Source	Description
—	cna	An app may be able to cause unexpected system termination
CWE-843	adp	CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (2)