CVE-2012-1938: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 4.8% chance of exploitation in the next 30 days.

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 13.0, Thunderbird before 13.0, and SeaMonkey before 2.10 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) methodjit/ImmutableSync.cpp, (2) the JSObject::makeDenseArraySlow function in js/src/jsarray.cpp, and unknown other components.

Affected products

• Mozilla Firefox: before 13.0 (fixed in 13.0)
• Mozilla Seamonkey: before 2.10 (fixed in 2.10)
• Mozilla Thunderbird: before 13.0 (fixed in 13.0)
• Opensuse Opensuse: version 11.4 only; version 12.1 only
• Red Hat Enterprise Linux Desktop: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Eus: version 6.2 only
• Red Hat Enterprise Linux Server: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Server Aus: version 6.2 only
• Red Hat Enterprise Linux Workstation: version 5.0 only; version 6.0 only
• Red Hat Storage: version 2.0 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 2012-06-05. Last modified 2026-06-16.