CVE-2018-20650: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 2.7% chance of exploitation in the next 30 days.

A reachable Object::dictLookup assertion in Poppler 0.72.0 allows attackers to cause a denial of service due to the lack of a check for the dict data type, as demonstrated by use of the FileSpec class (in FileSpec.cc) in pdfdetach.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Freedesktop Poppler: version 0.72.0 only
• Red Hat Enterprise Linux: version 8.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Eus: version 8.1 only; version 8.2 only; version 8.4 only; version 8.6 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 8.2 only; version 8.4 only; version 8.6 only
• Red Hat Enterprise Linux Server Tus: version 8.2 only; version 8.4 only; version 8.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2019-01-01. Last modified 2026-06-17.