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CVE-2025-38659

Estado: ModificadaMedia (5.5)—

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

gfs2: No more self recovery

When a node withdraws and it turns out that it is the only node that has the filesystem mounted, gfs2 currently tries to replay the local journal to bring the filesystem back into a consistent state. Not only is that a very bad idea, it has also never worked because gfs2_recover_func() will refuse to do anything during a withdraw.

However, before even getting to this point, gfs2_recover_func() dereferences sdp->sd_jdesc->jd_inode. This was a use-after-free before commit 04133b607a78 ("gfs2: Prevent double iput for journal on error") and is a NULL pointer dereference since then.

Leer descripción completaMostrar menos

Simply get rid of self recovery to fix that.

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-38659",
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          "value": "CWE-476"
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: No more self recovery\n\nWhen a node withdraws and it turns out that it is the only node that has\nthe filesystem mounted, gfs2 currently tries to replay the local journal\nto bring the filesystem back into a consistent state.  Not only is that\na very bad idea, it has also never worked because gfs2_recover_func()\nwill refuse to do anything during a withdraw.\n\nHowever, before even getting to this point, gfs2_recover_func()\ndereferences sdp->sd_jdesc->jd_inode.  This was a use-after-free before\ncommit 04133b607a78 (\"gfs2: Prevent double iput for journal on error\")\nand is a NULL pointer dereference since then.\n\nSimply get rid of self recovery to fix that."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gfs2: No más autorrecuperación. Cuando un nodo se retira y resulta ser el único que tiene montado el sistema de archivos, gfs2 intenta reproducir el diario local para restablecer la consistencia del sistema de archivos. Esto no solo es una pésima idea, sino que nunca ha funcionado, ya que gfs2_recover_func() se niega a hacer nada durante una retirada. Sin embargo, incluso antes de llegar a este punto, gfs2_recover_func() desreferencia sdp->sd_jdesc->jd_inode. Esto era un use-after-free antes del commit 04133b607a78 (\"gfs2: Evitar doble entrada para el diario en caso de error\") y, desde entonces, es una desreferencia de puntero nulo. Simplemente elimine la autorrecuperación para solucionarlo."
    }
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  "lastModified": "2026-07-30T06:23:33.537",
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