CVE-2018-18459: Xpdfreader Xpdf

Medium severity, CVSS 5.5. EPSS: 1.1% chance of exploitation in the next 30 days.

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Affected products

• Xpdfreader Xpdf: version 4.00 only

Published 2018-10-18. Last modified 2026-06-17.