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CVE-2025-38411

Estado: ModificadaAlta (7.8)—

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

netfs: Fix double put of request

If a netfs request finishes during the pause loop, it will have the ref that belongs to the IN_PROGRESS flag removed at that point - however, if it then goes to the final wait loop, that will *also* put the ref because it sees that the IN_PROGRESS flag is clear and incorrectly assumes that this happened when it called the collector.

In fact, since IN_PROGRESS is clear, we shouldn't call the collector again since it's done all the cleanup, such as calling ->ki_complete().

Fix this by making netfs_collect_in_app() just return, indicating that we're done if IN_PROGRESS is removed.

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 CWE-415 (double free) que permite escalada de privilegios y ejecución de código con permisos elevados tras liberar memoria duplicada.

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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  "published": "2025-07-25T14:15:32.790",
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          "value": "CWE-415"
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix double put of request\n\nIf a netfs request finishes during the pause loop, it will have the ref\nthat belongs to the IN_PROGRESS flag removed at that point - however, if it\nthen goes to the final wait loop, that will *also* put the ref because it\nsees that the IN_PROGRESS flag is clear and incorrectly assumes that this\nhappened when it called the collector.\n\nIn fact, since IN_PROGRESS is clear, we shouldn't call the collector again\nsince it's done all the cleanup, such as calling ->ki_complete().\n\nFix this by making netfs_collect_in_app() just return, indicating that\nwe're done if IN_PROGRESS is removed."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: Corregir doble put de solicitud Si una solicitud netfs finaliza durante el bucle de pausa, tendrá la referencia que pertenece al indicador IN_PROGRESS eliminada en ese punto; sin embargo, si luego va al bucle de espera final, eso *también* pondrá la referencia porque ve que el indicador IN_PROGRESS está limpio y asume incorrectamente que esto sucedió cuando llamó al recopilador. De hecho, como IN_PROGRESS está limpio, no deberíamos volver a llamar al recopilador ya que ha hecho toda la limpieza, como llamar a ->ki_complete(). Corrija esto haciendo que netfs_collect_in_app() simplemente regrese, lo que indica que hemos terminado si se elimina IN_PROGRESS."
    }
  ],
  "lastModified": "2026-07-30T06:23:12.757",
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