CVE-2012-1940
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x...
9.3 High
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by changing the size of a container of absolutely positioned elements in a column.
Exploit likelihood
4.44%Down 2.2 points since Feb 4, 2022
What each source reports
NVD Score used
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by changing the size of a container of absolutely positioned elements in a column.
- Record
CVE-2012-1940- CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by changing the size of a container of absolutely positioned elements in a column.
- Record
CVE-2012-1940- Updated
- 2026-11-02
EUVDEUVD-2012-1949 No score
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by changing the size of a container of absolutely positioned elements in a column.
- Record
EUVD-2012-1949- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rqvr-fvm8-wh8c No score
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x...
Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by changing the size of a container of absolutely positioned elements in a column.
- Record
GHSA-rqvr-fvm8-wh8c- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score
MozillaFirefox-50.1.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10071-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10218-1 No score
seamonkey-2.40-6.1 on GA media
These are all security issues fixed in the seamonkey-2.40-6.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10218-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10230-1 No score
MozillaThunderbird-45.5.1-1.1 on GA media
These are all security issues fixed in the MozillaThunderbird-45.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10230-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
iceweaselDebian:6.0 From an advisory covering 3 CVEs |
before 3.5.16-16, plus listed versions 3.5.16-103.5.16-10~bpo50+13.5.16-113.5.16-11~bpo50+13.5.16-12 Show 13 moreShow less3.5.16-133.5.16-143.5.16-153.5.16-43.5.16-53.5.16-5~bpo50+13.5.16-63.5.16-6~bpo50+13.5.16-73.5.16-7~bpo50+13.5.16-83.5.16-8~bpo50+13.5.16-9 |
3.5.16-16 |
iceapeDebian:6.0 From an advisory covering 3 CVEs |
before 2.0.11-13, plus listed versions 2.0.11-102.0.11-112.0.11-122.0.11-22.0.11-3 Show 6 moreShow less2.0.11-42.0.11-52.0.11-62.0.11-72.0.11-82.0.11-9 |
2.0.11-13 |
icedoveDebian:6.0 From an advisory covering 3 CVEs |
before 3.0.11-1+squeeze11, plus listed versions 3.0.11-13.0.11-1+squeeze13.0.11-1+squeeze103.0.11-1+squeeze23.0.11-1+squeeze3 Show 6 moreShow less3.0.11-1+squeeze43.0.11-1+squeeze53.0.11-1+squeeze63.0.11-1+squeeze73.0.11-1+squeeze83.0.11-1+squeeze9 |
3.0.11-1+squeeze11 |
firefoxRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
firefox-debuginfoRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::client_workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::client_workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-develRed Hat:enterprise_linux:5::client_workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
Show 37 moreShow less
| Package | Affected | Fixed |
|---|---|---|
firefoxRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
firefox-debuginfoRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-develRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
firefoxRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefoxRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefoxRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefoxRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
thunderbirdRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbird-debuginfoRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbirdRed Hat:rhel_productivity:5 From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbird-debuginfoRed Hat:rhel_productivity:5 From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbirdRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbirdRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbirdRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
MozillaFirefoxopenSUSE:Tumbleweed From an advisory covering 899 CVEs |
before 50.1.0-1.1 | 50.1.0-1.1 |
MozillaThunderbirdopenSUSE:Tumbleweed From an advisory covering 560 CVEs |
before 45.5.1-1.1 | 45.5.1-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2012-1940 is a high vulnerability (CVSS 9.3) in Mozilla Firefox, published June 5, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.44%, the 91st percentile. No source names a fixed version.
References
mandriva.com/security/advisories?name=MDVSA-2012:088
debian.org/security/2012/dsa-2488
rhn.redhat.com/errata/RHSA-2012-0710.html
mozilla.org/security/announce/2012/mfsa2012-40.html
lists.opensuse.org/opensuse-security-announce/2012-06/msg00012.html
Show 194 moreShow less
bugzilla.mozilla.org/show_bug.cgi?id=747688
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17054
securityfocus.com/bid/53794
nvd.nist.gov/vuln/detail/CVE-2012-1940
github.com/advisories/GHSA-rqvr-fvm8-wh8c
access.redhat.com/errata/RHSA-2012:0710
bugzilla.redhat.com/show_bug.cgi?id=827829
security.access.redhat.com/data/csaf/v2/advisories/2012/rhsa-2012_0710.json
cve.org/CVERecord?id=CVE-2011-3101
suse.com/security/cve/CVE-2008-5913
This page doesn't list everything
Left out here: 800 references. The JSON record has them.