Mozilla: Buffer overflow and use-after-free issues found using Address Sanitizer (MFSA 2012-40)
Published Jun 5, 2012
9.3
HIGHCVSS 2.0
EPSS 4.53%
Description
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.
Affected products
No data.
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0.1
- 5.0
- 5.0.1
- 6.0
- 6.0.1
- 6.0.2
- 7.0
- 7.0.1
- 8.0
- 8.0.1
- 9.0
- 9.0.1
- 10.0
- 10.0.1
- 10.0.2
- 10.0.3
- 10.0.4
- 11.0
- 12.0
- 12.0
- ≤ 2.9
- 1.0
- 1.0
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.0.9
- 1.1
- 1.1
- 1.1
- 1.1.1
- 1.1.2
- 1.1.3
- 1.1.4
- 1.1.5
- 1.1.6
- 1.1.7
- 1.1.8
- 1.1.9
- 1.1.10
- 1.1.11
- 1.1.12
- 1.1.13
- 1.1.14
- 1.1.15
- 1.1.16
- 1.1.17
- 1.1.18
- 1.1.19
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- 2.0.5
- 2.0.6
- 2.0.7
- 2.0.8
- 2.0.9
- 2.0.10
- 2.0.11
- 2.0.12
- 2.0.13
- 2.0.14
- 2.1
- 2.1
- 2.1
- 2.1
- 2.1
- 2.1
- 2.1
- 2.1
- 2.1
- 2.2
- 2.2
- 2.2
- 2.2
- 2.3
- 2.3
- 2.3
- 2.3
- 2.3.1
- 2.3.2
- 2.3.3
- 2.4
- 2.4
- 2.4
- 2.4
- 2.4.1
- 2.5
- 2.5
- 2.5
- 2.5
- 2.5
- 2.6
- 2.6
- 2.6
- 2.6
- 2.6
- 2.6.1
- 2.7
- 2.7
- 2.7
- 2.7
- 2.7
- 2.7
- 2.7.1
- 2.7.2
- 2.8
- 2.8
- 2.8
- 2.8
- 2.8
- 2.8
- 2.8
- 2.9
- 2.9
- 2.9
- 5.0
- 6.0
- 6.0.1
- 6.0.2
- 7.0
- 7.0.1
- 8.0
- 9.0
- 9.0.1
- 10.0
- 10.0.1
- 10.0.2
- 10.0.3
- 10.0.4
- 11.0
- 12.0
- 10.0
- 10.0.1
- 10.0.2
- 10.0.3
- 10.0.4
No data.
Red Hat Enterprise Linux 5
firefox-0:10.0.5-1.el5_8
Fixed · RHSA-2012:0710
Red Hat Enterprise Linux 5
thunderbird-0:10.0.5-2.el5_8
Fixed · RHSA-2012:0715
Red Hat Enterprise Linux 5
xulrunner-0:10.0.5-1.el5_8
Fixed · RHSA-2012:0710
Red Hat Enterprise Linux 6
firefox-0:10.0.5-1.el6_2
Fixed · RHSA-2012:0710
Red Hat Enterprise Linux 6
thunderbird-0:10.0.5-2.el6_2
Fixed · RHSA-2012:0715
Red Hat Enterprise Linux 6
xulrunner-0:10.0.5-1.el6_2
Fixed · RHSA-2012:0710
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox-0:10.0.5-1.el5_8 | Fixed | RHSA-2012:0710 |
| Red Hat Enterprise Linux 5 | thunderbird-0:10.0.5-2.el5_8 | Fixed | RHSA-2012:0715 |
| Red Hat Enterprise Linux 5 | xulrunner-0:10.0.5-1.el5_8 | Fixed | RHSA-2012:0710 |
| Red Hat Enterprise Linux 6 | firefox-0:10.0.5-1.el6_2 | Fixed | RHSA-2012:0710 |
| Red Hat Enterprise Linux 6 | thunderbird-0:10.0.5-2.el6_2 | Fixed | RHSA-2012:0715 |
| Red Hat Enterprise Linux 6 | xulrunner-0:10.0.5-1.el6_2 | Fixed | RHSA-2012:0710 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.53% (0.04527) | 91.24th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.53% (0.04527) | 90.29th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.72% (0.02722) | 84.65th | v4 (v2025.03.14) |
| Mar 29, 2025 | 10.87% (0.10872) | 88.93th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.72% (0.02722) | 84.96th | v4 (v2025.03.14) |
| Jan 24, 2025 | 7.95% (0.07952) | 94.30th | v3 (v2023.03.01) |
| Dec 12, 2024 | 5.53% (0.05531) | 93.51th | v3 (v2023.03.01) |
| May 1, 2024 | 4.66% (0.04661) | 92.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.61% (0.04607) | 91.27th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.60% (0.06604) | 91.53th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.60% (0.06604) | 90.72th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.60% (0.06604) | 78.62th | v2 (v2022.01.01) |
References (16)
- http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00012.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00015.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2012-0710.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-0715.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2012/dsa-2488 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2012/dsa-2489 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2012/dsa-2499 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:088 vendor-advisoryx_refsource_MANDRIVA
- http://www.mozilla.org/security/announce/2012/mfsa2012-40.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/53794 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2012-1940 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=747688 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=827843 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-1940
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17054 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2012-1940
Change history (0)
No recorded changes yet.