Integer overflow in macOS - CVE-2026-20639
Published: March 25, 2026
Vulnerability identifier: #VU124408
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20639
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow in configd. A local user can pass a specially crafted string to the daemon, trigger an integer overflow and execute arbitrary code with elevated privileges.
Affected software
macOS
How to mitigate CVE-2026-20639
Install update from vendor's website.
macOS - addressed in versions 15.7.5 24G624, 14.8.5 23J423, 26.3 25D125