CVE-2013-3954: Apple iPhone OS

Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days.

The posix_spawn system call in the XNU kernel in Apple Mac OS X 10.8.x does not properly validate the data for file actions and port actions, which allows local users to (1) cause a denial of service (panic) via a size value that is inconsistent with a header count field, or (2) obtain sensitive information from kernel heap memory via a certain size value in conjunction with a crafted buffer.

Affected products

• Apple iPhone OS: up to and including 6.1.4; version 1.0.0 only; version 1.0.1 only; version 1.0.2 only; version 1.1.0 only; version 1.1.1 only; …
• Apple Mac OS X: version 10.8.0 only; version 10.8.1 only; version 10.8.2 only; version 10.8.3 only; version 10.8.4 only

Published 2013-06-05. Last modified 2026-06-16.