CVE-2012-1938

CVE-2012-1938 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Mozilla Firefox
• Published: 2012-06-05
• Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2012-1938?

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.

How severe is CVE-2012-1938?

CVE-2012-1938 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2012-1938 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1938?

CVE-2012-1938 primarily affects Mozilla Firefox. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-1938?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2012-1938 published?

CVE-2012-1938 was published on 2012-06-05 and last updated on 2026-06-16.

References

• http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00012.html
• http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00015.html
• http://rhn.redhat.com/errata/RHSA-2012-0710.html
• http://rhn.redhat.com/errata/RHSA-2012-0715.html
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:088
• http://www.mozilla.org/security/announce/2012/mfsa2012-34.html
• http://www.securityfocus.com/bid/53796
• https://bugzilla.mozilla.org/show_bug.cgi?id=670317
• https://bugzilla.mozilla.org/show_bug.cgi?id=699594
• https://bugzilla.mozilla.org/show_bug.cgi?id=708688
• https://bugzilla.mozilla.org/show_bug.cgi?id=716067
• https://bugzilla.mozilla.org/show_bug.cgi?id=718852
• https://bugzilla.mozilla.org/show_bug.cgi?id=723773
• https://bugzilla.mozilla.org/show_bug.cgi?id=723971
• https://bugzilla.mozilla.org/show_bug.cgi?id=730415
• https://bugzilla.mozilla.org/show_bug.cgi?id=736012
• https://bugzilla.mozilla.org/show_bug.cgi?id=748948
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17058

Affected products (21)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:12.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_desktop:10:sp4:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_desktop:11:sp1:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:*:vmware:*:*
• cpe:2.3:o:suse:linux_enterprise_software_development_kit:10:sp4:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp1:*:*:*:*:*:*
• cpe:2.3:a:redhat:storage:2.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_eus:6.2:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.2:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

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