CVE-2026-64699 | A memory initialization issue was addressed with improved me… | CVSS 5.5 MEDIUM

Description

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to disclose kernel memory.

Metadata

CVE ID: CVE-2026-64699
State: PUBLISHED
Assigner: apple
Reserved: 2026-07-20 18:09 UTC
Published: 2026-07-27 20:13 UTC
Last updated: 2026-07-28 14:26 UTC
Primary CWE: CWE-457
CWE-457 Use of Uninitialized Variable
Vendor / Product: Apple / macOS
Sources: cve.org · NVD

Severity & Metrics

5.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Apple	macOS	—	0 < 14.8.8, 0 < 15.7.8, 0 < 26.6

Weakness (CWE)

CWE	Source	Description
—	cna	An app may be able to disclose kernel memory
CWE-457	adp	CWE-457 Use of Uninitialized Variable

CVSS scores (1)

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

References (3)