CVE-2016-4574: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Off-by-one error in the append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read) via invalid utf-8 encoded data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-4356.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.10 only; version 16.04 only
• Gnupg Libksba: up to and including 1.3.3
• Opensuse Leap: version 42.1 only
• Opensuse Opensuse: version 13.2 only

Published 2016-06-13. Last modified 2026-06-17.