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CVE-2025-71269

Estado: ModificadaMedia (5.5)—

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

btrfs: do not free data reservation in fallback from inline due to -ENOSPC

If we fail to create an inline extent due to -ENOSPC, we will attempt to go through the normal COW path, reserve an extent, create an ordered extent, etc. However we were always freeing the reserved qgroup data, which is wrong since we will use data. Fix this by freeing the reserved qgroup data in __cow_file_range_inline() only if we are not doing the fallback (ret is <= 0).

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-2025-71269",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not free data reservation in fallback from inline due to -ENOSPC\n\nIf we fail to create an inline extent due to -ENOSPC, we will attempt to\ngo through the normal COW path, reserve an extent, create an ordered\nextent, etc. However we were always freeing the reserved qgroup data,\nwhich is wrong since we will use data. Fix this by freeing the reserved\nqgroup data in __cow_file_range_inline() only if we are not doing the\nfallback (ret is <= 0)."
    },
    {
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      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbtrfs: no liberar la reserva de datos en la alternativa de inline debido a -ENOSPC\n\nSi fallamos al crear una extensión inline debido a -ENOSPC, intentaremos seguir la ruta COW normal, reservar una extensión, crear una extensión ordenada, etc. Sin embargo, siempre estábamos liberando los datos qgroup reservados, lo cual es incorrecto ya que usaremos los datos. Corregir esto liberando los datos qgroup reservados en __cow_file_range_inline() solo si no estamos realizando la alternativa (ret es &lt;= 0)."
    }
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  "lastModified": "2026-07-30T06:24:56.980",
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