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CVE-2026-23423

Estado: AnalizadaMedia (5.5)—

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

btrfs: free pages on error in btrfs_uring_read_extent()

In this function the 'pages' object is never freed in the hopes that it is picked up by btrfs_uring_read_finished() whenever that executes in the future. But that's just the happy path. Along the way previous allocations might have gone wrong, or we might not get -EIOCBQUEUED from btrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a cleanup section that frees all memory allocated by this function without assuming any deferred execution, and this also needs to happen for the 'pages' allocation.

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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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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  "published": "2026-04-03T14:16:28.487",
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          "value": "CWE-401"
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free pages on error in btrfs_uring_read_extent()\n\nIn this function the 'pages' object is never freed in the hopes that it is\npicked up by btrfs_uring_read_finished() whenever that executes in the\nfuture. But that's just the happy path. Along the way previous\nallocations might have gone wrong, or we might not get -EIOCBQUEUED from\nbtrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a\ncleanup section that frees all memory allocated by this function without\nassuming any deferred execution, and this also needs to happen for the\n'pages' allocation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbtrfs: liberar páginas en caso de error en btrfs_uring_read_extent()\n\nEn esta función, el objeto 'pages' nunca se libera con la esperanza de que sea recogido por btrfs_uring_read_finished() cada vez que se ejecute en el futuro. Pero ese es solo el camino feliz. En el camino, asignaciones anteriores podrían haber salido mal, o podríamos no obtener -EIOCBQUEUED de btrfs_encoded_read_regular_fill_pages(). En todos estos casos, vamos a una sección de limpieza que libera toda la memoria asignada por esta función sin asumir ninguna ejecución diferida, y esto también debe ocurrir para la asignación de 'pages'."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
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