CVE-2018-9918: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 1.7% chance of exploitation in the next 30 days.

libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name object" cases, allowing remote attackers to cause a denial of service (stack exhaustion), related to the QPDFObjectHandle and QPDF_Dictionary classes, because nesting in direct objects is not restricted.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• Qpdf Project Qpdf: up to and including 8.0.2

Published 2018-04-10. Last modified 2026-06-17.