CVE-2011-2692: Canonical Ubuntu Linux

High severity, CVSS 8.8. EPSS: 4.2% chance of exploitation in the next 30 days.

The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.

Affected products

• Canonical Ubuntu Linux: version 8.04 only; version 10.04 only; version 10.10 only; version 11.04 only
• Debian Debian Linux: version 5.0 only; version 6.0 only
• Fedoraproject Fedora: version 14 only
• Libpng Libpng: from 1.0.0, before 1.0.55 (fixed in 1.0.55); from 1.2.0, before 1.2.45 (fixed in 1.2.45); from 1.4.0, before 1.4.8 (fixed in 1.4.8); from 1.5.0, before 1.5.4 (fixed in 1.5.4)

Published 2011-07-17. Last modified 2026-06-16.