CVE-2016-3074: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 37.2% chance of exploitation in the next 30 days.

Integer signedness error in GD Graphics Library 2.1.1 (aka libgd or libgd2) allows remote attackers to cause a denial of service (crash) or potentially execute arbitrary code via crafted compressed gd2 data, which triggers a heap-based buffer overflow.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.10 only; version 16.04 only
• Debian Debian Linux: version 7.0 only; version 8.0 only
• Fedoraproject Fedora: version 23 only; version 24 only
• Libgd Libgd: version 2.1.1 only
• Opensuse Opensuse: version 13.2 only
• PHP PHP: from 5.5.0, before 5.5.35 (fixed in 5.5.35); from 5.6.0, before 5.6.21 (fixed in 5.6.21); from 7.0.0, before 7.0.6 (fixed in 7.0.6)

Published 2016-04-26. Last modified 2026-06-17.