CVE-2003-0581: Xfstt

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

X Fontserver for Truetype fonts (xfstt) 1.4 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a (1) FS_QueryXExtents8 or (2) FS_QueryXBitmaps8 packet, and possibly other types of packets, with a large num_ranges value, which causes an out-of-bounds array access.

Affected products

• Xfstt Xfstt: version 1.2.1 only; version 1.4 only

Published 2003-08-18. Last modified 2026-06-16.