CVE-2015-7942: Apple iPhone OS

Medium severity, CVSS 6.8. EPSS: 4.7% chance of exploitation in the next 30 days.

The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.

Affected products

• Apple iPhone OS: up to and including 9.2.1
• Apple Mac OS X: up to and including 10.11.3
• Apple tvOS: up to and including 9.1
• Apple watchOS: up to and including 2.1
• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.04 only; version 15.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only
• HP Icewall Federation Agent: version 3.0 only
• HP Icewall File Manager: version 3.0 only
• Xmlsoft LIBXML2: version 2.9.2 only

Published 2015-11-18. Last modified 2026-06-17.