CVE-2021-3696
Estado: ModificadaMedia (4.5)—
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
- Puntuación base: 4.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.47%
- Percentil entre todas las CVEs puntuadas: 39
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (13)
GNU — Grub2Netapp — Ontap Select Deploy Administration UtilityRedhat — Codeready Linux BuilderRedhat — Developer ToolsRedhat — Enterprise LinuxRedhat — Enterprise Linux EUSRedhat — Enterprise Linux FOR Power Little EndianRedhat — Enterprise Linux FOR Power Little Endian EUSRedhat — Enterprise Linux Server AUSRedhat — Enterprise Linux Server FOR Power Little Endian Update Services FOR SAP SolutionsRedhat — Enterprise Linux Server TUSRedhat — OpenshiftRedhat — Openshift Container Platform
CWE
- CWE-787
- CWE-787
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-3696",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 6.9,
"accessVector": "LOCAL",
"vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
"authentication": "NONE",
"integrityImpact": "COMPLETE",
"accessComplexity": "MEDIUM",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "COMPLETE"
},
"acInsufInfo": false,
"impactScore": 10,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.4,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 4.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "LOW",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 3.4,
"exploitabilityScore": 1
}
]
},
"affected": [
{
"source": "secalert@redhat.com",
"affectedData": [
{
"vendor": "n/a",
"product": "grub2",
"versions": [
{
"status": "affected",
"version": "grub-2.06"
}
]
}
]
}
],
"published": "2022-07-06T16:15:08.270",
"references": [
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1991686",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://security.gentoo.org/glsa/202209-12",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://security.netapp.com/advisory/ntap-20220930-0001/",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1991686",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.gentoo.org/glsa/202209-12",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.netapp.com/advisory/ntap-20220930-0001/",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12."
},
{
"lang": "es",
"value": "Puede producirse una escritura fuera de límites de la pila durante el manejo de las tablas Huffman en el lector PNG. Esto puede conllevar a una corrupción de datos en el espacio de la pila. El impacto en la confidencialidad, integridad y disponibilidad puede considerarse bajo ya que es muy complejo que un atacante controle la codificación y el posicionamiento de las entradas Huffman corruptas para conseguir resultados como la ejecución de código arbitrario y/o la omisión del arranque seguro. Este fallo afecta a grub2 versiones anteriores a grub-2.12"
}
],
"lastModified": "2026-06-17T04:05:34.790",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B798FFCB-4972-436F-ADB4-8DA325089773",
"versionEndExcluding": "2.12",
"versionStartIncluding": "2.00"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:redhat:developer_tools:1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "60937D60-6B78-400F-8D30-7FCF328659A1"
},
{
"criteria": "cpe:2.3:a:redhat:openshift:3.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "62C4B3B6-7452-49AF-8981-737FE929FF97"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EF30E57A-97EA-4A44-8404-6AE4F058B44D"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5DAD1E4A-B22F-432C-97C8-D91D286535F1"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "831F0F47-3565-4763-B16F-C87B1FF2035E"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0E3F09B5-569F-4C58-9FCA-3C0953D107B5"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6C3741B8-851F-475D-B428-523F4F722350"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4DDA3E5A-8754-4C48-9A27-E2415F8A6000"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "47811209-5CE5-4375-8391-B0A7F6A0E420"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "35EEDB95-DCD1-4FED-9BBB-877B2062410C"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E5C80DB2-4A78-4EC9-B2A8-1E4D902C4834"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "983533DD-3970-4A37-9A9C-582BD48AA1E5"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "729C515E-1DD3-466D-A50B-AFE058FFC94A"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "868A6ED7-44DD-44FF-8ADD-9971298A1175"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6897676D-53F9-45B3-B27F-7FF9A4C58D33"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E28F226A-CBC7-4A32-BE58-398FA5B42481"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "76C24D94-834A-4E9D-8F73-624AFA99AAA2"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4DF2B9A2-8CA6-4EDF-9975-07265E363ED2"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7DA6A5AF-2EBE-4ED9-B312-DCD9D150D031"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "22D095ED-9247-4133-A133-73B7668565E4"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "871A5C26-DB7B-4870-A5B2-5DD24C90B4A7"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "492DF629-16B8-4882-822D-A6897B03DD30"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B09ACF2D-D83F-4A86-8185-9569605D8EE1"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AC10D919-57FD-4725-B8D2-39ECB476902F"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1272DF03-7674-4BD4-8E64-94004B195448"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6B62E762-2878-455A-93C9-A5DB430D7BB5"
},
{
"criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.9:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "81609549-25CE-4C8A-9DE3-170D23704208"
},
{
"criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.10:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0595C9F8-9C7A-4FC1-B7EE-52978A1B1E93"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1CD81C46-328B-412D-AF4E-68A2AD2F1A73"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "831F0F47-3565-4763-B16F-C87B1FF2035E"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "0E3F09B5-569F-4C58-9FCA-3C0953D107B5"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "6C3741B8-851F-475D-B428-523F4F722350"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4DDA3E5A-8754-4C48-9A27-E2415F8A6000"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E7CF3019-975D-40BB-A8A4-894E62BD3797"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secalert@redhat.com"
}