CVE-2015-8806: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 5% chance of exploitation in the next 30 days.

dict.c in libxml2 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via an unexpected character immediately after the "<!DOCTYPE html" substring in a crafted HTML document.

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 8.0 only
• Xmlsoft LIBXML2: before 2.9.4 (fixed in 2.9.4)

Published 2016-04-13. Last modified 2026-06-17.