CVE-2025-43237: Apple macOS

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.6. An app may be able to cause unexpected system termination.

Affected products

• Apple macOS: before 15.6 (fixed in 15.6)

Published 2025-07-30. Last modified 2026-06-17.