Main Vulnerability Database Vulnerabilities #VU158014

Memory corruption in macOS - CVE-2026-86942

Published: October 27, 2026

Vulnerability identifier: #VU158014

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-86942

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local application to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in Heimdal. A local application can cause a denial-of-service.

macOS
Apple iOS
iPadOS

Install update from vendor's website.

macOS - addressed in versions 26.7.2 25G332, 15.8.2 24H232
Apple iOS - update to 26.7.2
iPadOS - update to 26.7.2