CVE-2006-3739: X.org

High severity, CVSS 7.2. EPSS: 0.6% chance of exploitation in the next 30 days.

Integer overflow in the CIDAFM function in X.Org 6.8.2 and XFree86 X server allows local users to execute arbitrary code via crafted Adobe Font Metrics (AFM) files with a modified number of character metrics (StartCharMetrics), which leads to a heap-based buffer overflow.

Affected products

• X.org X.org: version 6.8.2 only
• XFREE86 Project XFREE86 X: any version

Published 2006-09-13. Last modified 2026-06-16.