CVE-2012-1974
Status: ModifiedHigh (10)—
Use-after-free vulnerability in the gfxTextRun::CanBreakLineBefore function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
CVSS
- Version: 2.0
- Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
- Base score: 10
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 5.57%
- Percentile among all scored CVEs: 93
- Score date: 10/7/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (15)
Canonical — Ubuntu LinuxDebian — Debian LinuxMozilla — FirefoxMozilla — SeamonkeyMozilla — ThunderbirdMozilla — Thunderbird ESROpensuse — OpensuseRedhat — Enterprise Linux DesktopRedhat — Enterprise Linux EUSRedhat — Enterprise Linux ServerRedhat — Enterprise Linux Server EUSRedhat — Enterprise Linux WorkstationSuse — Linux Enterprise DesktopSuse — Linux Enterprise ServerSuse — Linux Enterprise Software Development KIT
CWEs
- CWE-416
References
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html
- http://rhn.redhat.com/errata/RHSA-2012-1210.html
- http://rhn.redhat.com/errata/RHSA-2012-1211.html
- http://www.debian.org/security/2012/dsa-2553
- http://www.debian.org/security/2012/dsa-2554
- http://www.debian.org/security/2012/dsa-2556
- http://www.mozilla.org/security/announce/2012/mfsa2012-58.html
- http://www.securityfocus.com/bid/55317
- http://www.ubuntu.com/usn/USN-1548-1
- http://www.ubuntu.com/usn/USN-1548-2
- http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf
- https://bugzilla.mozilla.org/show_bug.cgi?id=769303
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17015
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html
- http://rhn.redhat.com/errata/RHSA-2012-1210.html
- http://rhn.redhat.com/errata/RHSA-2012-1211.html
- http://www.debian.org/security/2012/dsa-2553
- http://www.debian.org/security/2012/dsa-2554
- http://www.debian.org/security/2012/dsa-2556
- http://www.mozilla.org/security/announce/2012/mfsa2012-58.html
- http://www.securityfocus.com/bid/55317
- http://www.ubuntu.com/usn/USN-1548-1
- http://www.ubuntu.com/usn/USN-1548-2
- http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf
- https://bugzilla.mozilla.org/show_bug.cgi?id=769303
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17015
Raw JSON (NVD)
Show
{
"id": "CVE-2012-1974",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 10,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
"authentication": "NONE",
"integrityImpact": "COMPLETE",
"accessComplexity": "LOW",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "COMPLETE"
},
"acInsufInfo": false,
"impactScore": 10,
"baseSeverity": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2012-08-29T10:56:40.020",
"references": [
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://rhn.redhat.com/errata/RHSA-2012-1210.html",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://rhn.redhat.com/errata/RHSA-2012-1211.html",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.debian.org/security/2012/dsa-2553",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.debian.org/security/2012/dsa-2554",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.debian.org/security/2012/dsa-2556",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.mozilla.org/security/announce/2012/mfsa2012-58.html",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/bid/55317",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.ubuntu.com/usn/USN-1548-1",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.ubuntu.com/usn/USN-1548-2",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=769303",
"tags": [
"Issue Tracking",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17015",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://rhn.redhat.com/errata/RHSA-2012-1210.html",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://rhn.redhat.com/errata/RHSA-2012-1211.html",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.debian.org/security/2012/dsa-2553",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.debian.org/security/2012/dsa-2554",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.debian.org/security/2012/dsa-2556",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.mozilla.org/security/announce/2012/mfsa2012-58.html",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securityfocus.com/bid/55317",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.ubuntu.com/usn/USN-1548-1",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.ubuntu.com/usn/USN-1548-2",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=769303",
"tags": [
"Issue Tracking",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17015",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Use-after-free vulnerability in the gfxTextRun::CanBreakLineBefore function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors."
},
{
"lang": "es",
"value": "Vulnerabilidad usar-después-liberar(use-after-free) en la función gfxTextRun::CanBreakLineBefore en Mozilla Firefox anterior a v15.0, Firefox ESR v10.x anterior a v10.0.7, Thunderbird anterior a v15.0, Thunderbird ESR v10.x anterior a v10.0.7, y SeaMonkey anterior a v2.12 permite a atacantes remotos ejecutar código de su elección o provocar una denegación de servicio a través de vectores no especificados."
}
],
"lastModified": "2026-06-16T23:40:43.160",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C799B400-15AC-4E56-82EE-0C7782C05640",
"versionEndExcluding": "15.0"
},
{
"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0707AB0D-8804-42B2-B236-6833A4260588",
"versionEndExcluding": "10.0.7",
"versionStartIncluding": "10.0"
},
{
"criteria": "cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7358AD5C-6E80-4021-9CDE-797E1BE5830C",
"versionEndExcluding": "2.12"
},
{
"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5B8DA99F-4719-4A49-8CA3-903AC2262712",
"versionEndExcluding": "15.0"
},
{
"criteria": "cpe:2.3:a:mozilla:thunderbird_esr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FB089EB2-7625-48E4-BEA9-3683FC28C73A",
"versionEndExcluding": "10.0.7",
"versionStartIncluding": "10.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:opensuse:opensuse:12.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D806A17E-B8F9-466D-807D-3F1E77603DC8"
},
{
"criteria": "cpe:2.3:o:suse:linux_enterprise_desktop:10:sp4:*:*:-:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4339DE06-19FB-4B8E-B6AE-3495F605AD05"
},
{
"criteria": "cpe:2.3:o:suse:linux_enterprise_desktop:11:sp2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "00720D8C-3FF3-4B1C-B74B-91F01A544399"
},
{
"criteria": "cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:-:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D1D7B467-58DD-45F1-9F1F-632620DF072A"
},
{
"criteria": "cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:*:-:*:*",
"vulnerable": true,
"matchCriteriaId": "88D6E858-FD8F-4C55-B7D5-CEEDA2BBA898"
},
{
"criteria": "cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:*:vmware:*:*",
"vulnerable": true,
"matchCriteriaId": "DB4D6749-81A1-41D7-BF4F-1C45A7F49A22"
},
{
"criteria": "cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5AA37837-3083-4DC7-94F4-54FD5D7CB53C"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "133AAFA7-AF42-4D7B-8822-AA2E85611BF5"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EE249E1B-A1FD-4E08-AA71-A0E1F10FFE97"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:6.3:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8382A145-CDD9-437E-9DE7-A349956778B3"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "54D669D4-6D7E-449D-80C1-28FA44F06FFE"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9BBCD86A-E6C7-4444-9D74-F861084090F0"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_eus:6.3:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "413CC30E-5FFE-47A4-B38B-80E3A9B13238"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D0AC5CD5-6E58-433C-9EB3-6DFE5656463E"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E5ED5807-55B7-47C5-97A6-03233F4FBC3A"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A9BD9DD2-B468-4732-ABB1-742D83709B54"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EF49D26F-142E-468B-87C1-BABEA445255C"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E4174F4F-149E-41A6-BBCC-D01114C05F38"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8D305F7A-D159-4716-AB26-5E38BB5CD991"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "036E8A89-7A16-411F-9D31-676313BB7244"
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}