Main Vulnerability Database Vulnerabilities #VU124407

Use after free in macOS - CVE-2026-20637

Published: March 25, 2026

Vulnerability identifier: #VU124407

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2026-20637

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Apple Inc.

Affected software:
macOS

Detailed vulnerability description

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

The vulnerability exists due to a use-after-free error in AppleKeyStore. A local application can cause unexpected system termination.

Install update from vendor's website.