CVE-2006-3740: X.org

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

Integer overflow in the scan_cidfont function in X.Org 6.8.2 and XFree86 X server allows local users to execute arbitrary code via crafted (1) CMap and (2) CIDFont font data with modified item counts in the (a) begincodespacerange, (b) cidrange, and (c) notdefrange sections.

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.