CVE-2021-26381
Estado: AplazadaAlta (7.1)—
Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.
CVSS
- Versión: 4.0
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Puntuación base: 7.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1565.001Stored Data Manipulationimpact75 % - Impacto secundario
T1499.004Application or System Exploitationimpact65 %
Acceso local con PR:H sin interacción (AV:L/PR:H/UI:N) → T1068. CWE-770 (resource exhaustion) + corrupción de memoria kernel → T1565.001 (manipulación de datos) primaria y T1499.004 (resource exhaustion del kernel) secundaria.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
CWE
- CWE-770
Referencias
JSON original (NVD)
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{
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"version": "2.0.3",
"timestamp": "2026-02-11T04:56:50.339235Z"
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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"published": "2026-02-10T20:16:41.110",
"references": [
{
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4013.html",
"source": "psirt@amd.com"
},
{
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html",
"source": "psirt@amd.com"
}
],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@amd.com",
"description": [
{
"lang": "en",
"value": "CWE-770"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption."
},
{
"lang": "es",
"value": "La validación incorrecta de parámetros de llamadas al sistema en el SO Confiable podría permitir a un controlador malicioso realizar operaciones de mapeo o desmapeo en un gran número de páginas, lo que podría resultar en corrupción de memoria del kernel."
}
],
"lastModified": "2026-06-17T03:43:17.217",
"sourceIdentifier": "psirt@amd.com"
}