CVE-2020-6556
Estado: ModificadaAlta (8.8)—
Heap buffer overflow in SwiftShader in Google Chrome prior to 84.0.4147.135 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 3.29%
- Percentil entre todas las CVEs puntuadas: 88
- Fecha de la puntuación: 7/10/2026
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 (4)
CWE
- CWE-787
Referencias
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00049.html
- https://chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop_18.html
- https://crbug.com/1115345
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE7XWIZBME7JAY7N6CGPET4CLNHHEIVT/
- https://www.debian.org/security/2021/dsa-4824
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00049.html
- https://chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop_18.html
- https://crbug.com/1115345
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE7XWIZBME7JAY7N6CGPET4CLNHHEIVT/
- https://www.debian.org/security/2021/dsa-4824
JSON original (NVD)
Mostrar
{
"id": "CVE-2020-6556",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 9.3,
"accessVector": "NETWORK",
"vectorString": "AV:N/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": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 8.6,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "chrome-cve-admin@google.com",
"affectedData": [
{
"vendor": "Google",
"product": "Chrome",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "84.0.4147.135",
"versionType": "custom"
}
]
}
]
}
],
"published": "2020-09-21T20:15:14.493",
"references": [
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00049.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "chrome-cve-admin@google.com"
},
{
"url": "https://chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop_18.html",
"tags": [
"Vendor Advisory"
],
"source": "chrome-cve-admin@google.com"
},
{
"url": "https://crbug.com/1115345",
"tags": [
"Third Party Advisory"
],
"source": "chrome-cve-admin@google.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE7XWIZBME7JAY7N6CGPET4CLNHHEIVT/",
"source": "chrome-cve-admin@google.com"
},
{
"url": "https://www.debian.org/security/2021/dsa-4824",
"tags": [
"Third Party Advisory"
],
"source": "chrome-cve-admin@google.com"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00049.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop_18.html",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://crbug.com/1115345",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE7XWIZBME7JAY7N6CGPET4CLNHHEIVT/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.debian.org/security/2021/dsa-4824",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Heap buffer overflow in SwiftShader in Google Chrome prior to 84.0.4147.135 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page."
},
{
"lang": "es",
"value": "Un desbordamiento del búfer de la pila en SwiftShader en Google Chrome versiones anteriores a 84.0.4147.135, permitía a un atacante remoto explotar potencialmente una corrupción de la pila por medio de una página HTML diseñada"
}
],
"lastModified": "2026-06-17T03:23:35.517",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FF2D9DD8-01E9-44BB-83A5-F7CBBA43535E",
"versionEndExcluding": "84.0.4147.125"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493"
},
{
"criteria": "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B009C22E-30A4-4288-BCF6-C3E81DEAF45A"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "chrome-cve-admin@google.com"
}