CVE-2012-5840

Name: CVE-2012-5840
Creator: NVD / NIST
Published: 2012-11-21T12:55:03.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 6.07%

Last modified Jun 16, 2026

CVE-2012-5840 is a vulnerability of currently unknown severity. Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors, a different vulnerability than CVE-2012-4214.. EPSS estimates a 6.07% chance of exploitation in the next 30 days.

Description

Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors, a different vulnerability than CVE-2012-4214.

Metrics

EPSS Probability

6.07%

92.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions	Update
Mozilla	Firefox	< 10.0.11	—
Mozilla	Firefox	< 17.0	—
Mozilla	Seamonkey	< 2.14	—
Mozilla	Thunderbird	< 17.0	—
Mozilla	Thunderbird Esr	< 10.0.11	—
Opensuse	Opensuse	11.4	—
Opensuse	Opensuse	12.1	—
Opensuse	Opensuse	12.2	—
Suse	Linux Enterprise Desktop	10	Sp4
Suse	Linux Enterprise Desktop	11	Sp2
Suse	Linux Enterprise Server	10	Sp4
Suse	Linux Enterprise Server	11	Sp2
Suse	Linux Enterprise Software Development Kit	10	Sp4
Suse	Linux Enterprise Software Development Kit	11	Sp2
Canonical	Ubuntu Linux	10.04	—
Canonical	Ubuntu Linux	11.10	—
Canonical	Ubuntu Linux	12.04	—
Canonical	Ubuntu Linux	12.10	—
Redhat	Enterprise Linux Desktop	5.0	—
Redhat	Enterprise Linux Desktop	6.0	—
Redhat	Enterprise Linux Eus	6.3	—
Redhat	Enterprise Linux Server	5.0	—
Redhat	Enterprise Linux Server	6.0	—
Redhat	Enterprise Linux Workstation	5.0	—
Redhat	Enterprise Linux Workstation	6.0	—

References

http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.htmlMailing List, Third Party Advisory
http://osvdb.org/87606Broken Link, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2012-1482.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2012-1483.htmlThird Party Advisory
http://secunia.com/advisories/51359Third Party Advisory
http://secunia.com/advisories/51360Third Party Advisory
http://secunia.com/advisories/51369Third Party Advisory
http://secunia.com/advisories/51370Third Party Advisory
http://secunia.com/advisories/51381Third Party Advisory
http://secunia.com/advisories/51434Third Party Advisory
http://secunia.com/advisories/51439Third Party Advisory
http://secunia.com/advisories/51440Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:173Third Party Advisory
http://www.mozilla.org/security/announce/2012/mfsa2012-105.htmlVendor Advisory
http://www.palemoon.org/releasenotes-ng.shtmlBroken Link
http://www.securityfocus.com/bid/56635Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-1636-1Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-1Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-2Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-3Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=805287Exploit, Issue Tracking, Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80190Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16904Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.htmlMailing List, Third Party Advisory
http://osvdb.org/87606Broken Link, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2012-1482.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2012-1483.htmlThird Party Advisory
http://secunia.com/advisories/51359Third Party Advisory
http://secunia.com/advisories/51360Third Party Advisory
http://secunia.com/advisories/51369Third Party Advisory
http://secunia.com/advisories/51370Third Party Advisory
http://secunia.com/advisories/51381Third Party Advisory
http://secunia.com/advisories/51434Third Party Advisory
http://secunia.com/advisories/51439Third Party Advisory
http://secunia.com/advisories/51440Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:173Third Party Advisory
http://www.mozilla.org/security/announce/2012/mfsa2012-105.htmlVendor Advisory
http://www.palemoon.org/releasenotes-ng.shtmlBroken Link
http://www.securityfocus.com/bid/56635Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-1636-1Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-1Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-2Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-3Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=805287Exploit, Issue Tracking, Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80190Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16904Third Party Advisory

Timeline

Published: Nov 21, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-5840?

How severe is CVE-2012-5840?

Severity scoring for CVE-2012-5840 is pending analysis. The EPSS model estimates a 6.07% probability of exploitation in the next 30 days.

How do I fix CVE-2012-5840?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-5840?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST