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CVE-2022-50022

Estado: ModificadaAlta (7.8)—

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

drivers:md:fix a potential use-after-free bug

In line 2884, "raid5_release_stripe(sh);" drops the reference to sh and may cause sh to be released. However, sh is subsequently used in lines 2886 "if (sh->batch_head && sh != sh->batch_head)". This may result in an use-after-free bug.

It can be fixed by moving "raid5_release_stripe(sh);" to the bottom of the function.

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) en kernel Linux con use-after-free (CWE-416). Permite escalada de privilegios (C:H/I:H/A:H). Explotable desde proceso con privilegios de usuario para obtener ejecución de código en contexto privilegiado.

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\ndrivers:md:fix a potential use-after-free bug\n\nIn line 2884, \"raid5_release_stripe(sh);\" drops the reference to sh and\nmay cause sh to be released. However, sh is subsequently used in lines\n2886 \"if (sh->batch_head && sh != sh->batch_head)\". This may result in an\nuse-after-free bug.\n\nIt can be fixed by moving \"raid5_release_stripe(sh);\" to the bottom of\nthe function."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drivers:md:fix, un posible error de use-after-free. En la línea 2884, \"raid5_release_stripe(sh);\" omite la referencia a sh y puede provocar su liberación. Sin embargo, sh se utiliza posteriormente en la línea 2886 \"if (sh->batch_head && sh != sh->batch_head)\". Esto puede provocar un error de use-after-free. Se puede corregir moviendo \"raid5_release_stripe(sh);\" al final de la función."
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