CVE-2011-3193: Canonical Ubuntu Linux

High severity, CVSS 9.3. EPSS: 7.3% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.04 only
• Gnome Pango: before 1.25.1 (fixed in 1.25.1)
• Opensuse Opensuse: version 11.3 only; version 11.4 only
• Qt Qt: before 4.7.4 (fixed in 4.7.4)
• Red Hat Enterprise Linux Desktop: version 4.0 only; version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Eus: version 6.1 only
• Red Hat Enterprise Linux Server: version 4.0 only; version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Workstation: version 4.0 only; version 5.0 only; version 6.0 only

Published 2012-06-16. Last modified 2026-06-16.