CVE-2012-5838: Canonical Ubuntu Linux

High severity, CVSS 9.3. EPSS: 6.2% chance of exploitation in the next 30 days.

The copyTexImage2D implementation in the WebGL subsystem in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via large image dimensions.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.10 only; version 12.04 only; version 12.10 only
• Mozilla Firefox: before 10.0.11 (fixed in 10.0.11); before 17.0 (fixed in 17.0)
• Mozilla Seamonkey: before 2.14 (fixed in 2.14)
• Mozilla Thunderbird: before 17.0 (fixed in 17.0)
• Mozilla Thunderbird ESR: before 10.0.11 (fixed in 10.0.11)
• Opensuse Opensuse: version 11.4 only; version 12.1 only; version 12.2 only
• Suse Linux Enterprise Desktop: version 10 only; version 11 only
• Suse Linux Enterprise Server: version 10 only; version 11 only
• Suse Linux Enterprise Software Development Kit: version 10 only; version 11 only

Published 2012-11-21. Last modified 2026-06-16.