CVE-2026-39877 | A memory corruption issue was addressed with improved memory… | CVSS 7.8 HIGH

Description

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

Metadata

CVE ID: CVE-2026-39877
State: PUBLISHED
Assigner: apple
Reserved: 2026-04-07 19:58 UTC
Published: 2026-07-27 20:13 UTC
Last updated: 2026-07-28 14:21 UTC
Primary CWE: CWE-119
CWE-119 Improper Restriction of Operations within the Bounds…
Vendor / Product: Apple / macOS
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

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

Weakness (CWE)

CWE	Source	Description
—	cna	An app may be able to disclose kernel memory
CWE-119	adp	CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS scores (1)

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

References (2)