CVE-2009-1837: Debian Linux

High severity, CVSS 7.5. EPSS: 4.3% chance of exploitation in the next 30 days.

Race condition in the NPObjWrapper_NewResolve function in modules/plugin/base/src/nsJSNPRuntime.cpp in xul.dll in Mozilla Firefox 3 before 3.0.11 might allow remote attackers to execute arbitrary code via a page transition during Java applet loading, related to a use-after-free vulnerability for memory associated with a destroyed Java object.

Affected products

• Debian Debian Linux: version 5.0 only
• Fedoraproject Fedora: version 9 only; version 10 only
• Mozilla Firefox: from 3.0, before 3.0.11 (fixed in 3.0.11)
• Red Hat Enterprise Linux: version 4.0 only; version 5.0 only
• Red Hat Enterprise Linux Desktop: version 4.0 only; version 5.0 only
• Red Hat Enterprise Linux Eus: version 4.8 only; version 5.3 only
• Red Hat Enterprise Linux Server: version 4.0 only; version 5.0 only
• Red Hat Enterprise Linux Server Aus: version 5.3 only
• Red Hat Enterprise Linux Workstation: version 4.0 only; version 5.0 only

Published 2009-06-12. Last modified 2026-06-16.