CVE-2009-3382: Mozilla Firefox

High severity, CVSS 10.0. EPSS: 10.8% chance of exploitation in the next 30 days.

layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter frames, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

Affected products

• Mozilla Firefox: version 3.0.1 only; version 3.0.2 only; version 3.0.3 only; version 3.0.4 only; version 3.0.5 only; version 3.0.6 only; …

Published 2009-10-29. Last modified 2026-06-16.