CVE-2013-6425: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 2.9% chance of exploitation in the next 30 days.

Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org server and cairo, allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 12.10 only; version 13.04 only; version 13.10 only
• Debian Debian Linux: version 6.0 only; version 7.0 only
• Opensuse Opensuse: version 11.4 only; version 12.2 only; version 12.3 only; version 13.1 only
• Pixman Pixman: before 0.32.0 (fixed in 0.32.0)
• Red Hat Enterprise Linux Desktop: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Eus: version 6.5 only
• Red Hat Enterprise Linux Server: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Server Aus: version 6.5 only
• Red Hat Enterprise Linux Server Tus: version 6.5 only
• Red Hat Enterprise Linux Workstation: version 5.0 only; version 6.0 only

Published 2014-01-18. Last modified 2026-06-17.