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CVE-2026-23109

Estado: AnalizadaMedia (5.5)—

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

fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()

Above the while() loop in wait_sb_inodes(), we document that we must wait for all pages under writeback for data integrity. Consequently, if a mapping, like fuse, traditionally does not have data integrity semantics, there is no need to wait at all; we can simply skip these inodes.

This restores fuse back to prior behavior where syncs are no-ops. This fixes a user regression where if a system is running a faulty fuse server that does not reply to issued write requests, this causes wait_sb_inodes() to wait forever.

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-2026-23109",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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          "programFiles": [
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            "fs/fuse/file.c",
            "include/linux/pagemap.h"
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          "defaultStatus": "unaffected"
        },
        {
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          "product": "Linux",
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              "version": "6.16"
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              "status": "unaffected",
              "version": "0",
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              "versionType": "semver"
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            "fs/fuse/file.c",
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  "published": "2026-02-04T17:16:21.783",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()\n\nAbove the while() loop in wait_sb_inodes(), we document that we must wait\nfor all pages under writeback for data integrity.  Consequently, if a\nmapping, like fuse, traditionally does not have data integrity semantics,\nthere is no need to wait at all; we can simply skip these inodes.\n\nThis restores fuse back to prior behavior where syncs are no-ops.  This\nfixes a user regression where if a system is running a faulty fuse server\nthat does not reply to issued write requests, this causes wait_sb_inodes()\nto wait forever."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nfs/writeback: omitir los mapeos AS_NO_DATA_INTEGRITY en wait_sb_inodes()\n\nPor encima del bucle while() en wait_sb_inodes(), documentamos que debemos esperar por todas las páginas en proceso de escritura para la integridad de los datos. En consecuencia, si un mapeo, como fuse, tradicionalmente no tiene semántica de integridad de datos, no hay necesidad de esperar en absoluto; podemos simplemente omitir estos inodos.\n\nEsto restaura fuse a su comportamiento anterior donde las sincronizaciones son no-ops. Esto corrige una regresión de usuario donde si un sistema está ejecutando un servidor fuse defectuoso que no responde a las solicitudes de escritura emitidas, esto hace que wait_sb_inodes() espere indefinidamente."
    }
  ],
  "lastModified": "2026-06-17T10:20:54.607",
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