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CVE-2025-21988

Estado: ModificadaMedia (5.5)—

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

fs/netfs/read_collect: add to next->prev_donated

If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front").

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)

Mostrar
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  "id": "CVE-2025-21988",
  "cveTags": [],
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        "type": "Secondary",
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          "version": "3.1",
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          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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        "impactScore": 5.9,
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          "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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  },
  "affected": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.12"
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              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.20",
              "versionType": "semver",
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              "version": "6.13.8",
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
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          ],
          "programFiles": [
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          "defaultStatus": "affected"
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  "published": "2025-04-02T13:15:43.317",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024",
      "tags": [
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      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/netfs/read_collect: add to next->prev_donated\n\nIf multiple subrequests donate data to the same \"next\" request\n(depending on the subrequest completion order), each of them would\noverwrite the `prev_donated` field, causing data corruption and a\nBUG() crash (\"Can't donate prior to front\")."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/netfs/read_collect: agregar a next->prev_doned Si varias subsolicitudes donan datos a la misma solicitud \"siguiente\" (dependiendo del orden de finalización de las subsolicitudes), cada una de ellas sobrescribiría el campo `prev_doned`, lo que causaría corrupción de datos y un bloqueo de BUG() (\"No se puede donar antes del front\")."
    }
  ],
  "lastModified": "2026-07-30T06:22:01.917",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "6.12.20",
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              "versionEndExcluding": "6.13.8",
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          ],
          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}