CVE-2015-3721: Apple iPhone OS

Medium severity, CVSS 4.3. EPSS: 1.4% chance of exploitation in the next 30 days.

The kernel in Apple iOS before 8.4 and OS X before 10.10.4 does not properly handle HFS parameters, which allows attackers to obtain sensitive memory-layout information via a crafted app.

Affected products

• Apple iPhone OS: up to and including 8.3
• Apple Mac OS X: up to and including 10.10.3

Published 2015-07-03. Last modified 2026-06-17.