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CVE-2022-50142

Estado: AnalizadaAlta (7.8)—

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

intel_th: msu: Fix vmalloced buffers

After commit f5ff79fddf0e ("dma-mapping: remove CONFIG_DMA_REMAP") there's a chance of DMA buffer getting allocated via vmalloc(), which messes up the mmapping code:

> RIP: msc_mmap_fault [intel_th_msu] > Call Trace: > <TASK> > __do_fault > do_fault ...

Fix this by accounting for vmalloc possibility.

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.

Vulnerabilidad local (AV:L, PR:L) sin interacción en kernel Linux que permite escalar privilegios mediante buffers DMA mal gestionados; ejecución de código como impacto por corrupción de memoria (CWE-787 buffer overflow).

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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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nintel_th: msu: Fix vmalloced buffers\n\nAfter commit f5ff79fddf0e (\"dma-mapping: remove CONFIG_DMA_REMAP\") there's\na chance of DMA buffer getting allocated via vmalloc(), which messes up\nthe mmapping code:\n\n> RIP: msc_mmap_fault [intel_th_msu]\n> Call Trace:\n>  <TASK>\n>  __do_fault\n>  do_fault\n...\n\nFix this by accounting for vmalloc possibility."
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    }
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