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CVE-2023-53077

Estado: AnalizadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes

[WHY] When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dml_log2 returns an unexpected negative value:

[HOW]

In the case PTEBufferSizeInRequests is zero, skip the dml_log2() and assign the result directly.

Detalles técnicos trazas, registros y código del informe original
  shift exponent 4294966273 is too large for 32-bit type 'int'

CVSS

Probabilidad de explotación (EPSS)

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.

Acceso local con privilegios (PR:L, AV:L) permite escalada mediante desbordamiento de búfer (CWE-787) en driver gráfico AMD. Ejecución de código como impacto potencial.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes\n\n[WHY]\nWhen PTEBufferSizeInRequests is zero, UBSAN reports the following\nwarning because dml_log2 returns an unexpected negative value:\n\n  shift exponent 4294966273 is too large for 32-bit type 'int'\n\n[HOW]\n\nIn the case PTEBufferSizeInRequests is zero, skip the dml_log2() and\nassign the result directly."
    },
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      "lang": "es",
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    }
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