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CVE-2022-49388

Estado: AnalizadaAlta (7.8)—

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

ubi: ubi_create_volume: Fix use-after-free when volume creation failed

There is an use-after-free problem for 'eba_tbl' in ubi_create_volume()'s error handling path:

Fix it by removing redundant 'eba_tbl' releasing. Fetch a reproducer in [Link].

Detalles técnicos trazas, registros y código del informe original
  ubi_eba_replace_table(vol, eba_tbl)
    vol->eba_tbl = tbl
out_mapping:
  ubi_eba_destroy_table(eba_tbl)   // Free 'eba_tbl'
out_unlock:
  put_device(&vol->dev)
    vol_release
      kfree(tbl->entries)	  // UAF

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) de use-after-free (CWE-416) que permite escalada de privilegios con acceso previo (PR:L) sin interacción. El impacto potencial es ejecución de código en contexto elevado.

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)

Mostrar
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: ubi_create_volume: Fix use-after-free when volume creation failed\n\nThere is an use-after-free problem for 'eba_tbl' in ubi_create_volume()'s\nerror handling path:\n\n  ubi_eba_replace_table(vol, eba_tbl)\n    vol->eba_tbl = tbl\nout_mapping:\n  ubi_eba_destroy_table(eba_tbl)   // Free 'eba_tbl'\nout_unlock:\n  put_device(&vol->dev)\n    vol_release\n      kfree(tbl->entries)\t  // UAF\n\nFix it by removing redundant 'eba_tbl' releasing.\nFetch a reproducer in [Link]."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ubi: ubi_create_volume: Se corrige el problema de use-after-free cuando falla la creación del volumen Hay un problema de use-after-free para 'eba_tbl' en la ruta de gestión de errores de ubi_create_volume(): ubi_eba_replace_table(vol, eba_tbl) vol->eba_tbl = tbl out_mapping: ubi_eba_destroy_table(eba_tbl) // Libera 'eba_tbl' out_unlock: put_device(&vol->dev) vol_release kfree(tbl->entries) // UAF Arréglalo eliminando la liberación redundante de 'eba_tbl'. Obtén un reproductor en [Enlace]."
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