CVE-2016-1839: Apple iPhone OS
Medium severity, CVSS 5.5. EPSS: 7.3% chance of exploitation in the next 30 days.
The xmlDictAddString function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.
Affected products
- Apple iPhone OS: before 9.3.2 (fixed in 9.3.2)
- Apple Mac OS X: before 10.11.5 (fixed in 10.11.5)
- Apple tvOS: before 9.2.1 (fixed in 9.2.1)
- Apple watchOS: before 2.2.1 (fixed in 2.2.1)
- Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.10 only; version 16.04 only
- Debian Debian Linux: version 8.0 only
- McAfee Web Gateway: from 7.5.0.0, up to and including 7.5.2.10; from 7.6.0.0, up to and including 7.6.2.3
- Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
- Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
- Red Hat Enterprise Linux Server Aus: version 7.2 only; version 7.3 only; version 7.4 only; version 7.6 only
- Red Hat Enterprise Linux Server Eus: version 7.2 only; version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only
- Red Hat Enterprise Linux Server Tus: version 7.2 only; version 7.3 only; version 7.6 only
- Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
- Xmlsoft LIBXML2: before 2.9.4 (fixed in 2.9.4)
Published 2016-05-20. Last modified 2026-06-17.