FKIE_CVE-2025-38584

Vulnerability from fkie_nvd - Published: 2025-08-19 17:15 - Updated: 2026-06-17 09:17
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: padata: Fix pd UAF once and for all There is a race condition/UAF in padata_reorder that goes back to the initial commit. A reference count is taken at the start of the process in padata_do_parallel, and released at the end in padata_serial_worker. This reference count is (and only is) required for padata_replace to function correctly. If padata_replace is never called then there is no issue. In the function padata_reorder which serves as the core of padata, as soon as padata is added to queue->serial.list, and the associated spin lock released, that padata may be processed and the reference count on pd would go away. Fix this by getting the next padata before the squeue->serial lock is released. In order to make this possible, simplify padata_reorder by only calling it once the next padata arrives.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/609e59193fc6d9dd323f1c6ae1fdd721f1c79680
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71203f68c7749609d7fc8ae6ad054bdedeb24f91Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73f132e60857038416540c3599b1de6033d7575a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a11a12a9880ab37342b73c93cfe1a3ada02ff0db
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2048e475e22b13dc3e53d485b7e6e11464ed9a6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdf79bd2e1ecb3cc75631c73d8f4149be6019a52Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbe3e911a59bda6de96e7cae387ff882c2c177faPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f231d5d001ec75f5886c02d496a4c79edc383d45
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/padata.h",
            "kernel/padata.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a2048e475e22b13dc3e53d485b7e6e11464ed9a6",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "73f132e60857038416540c3599b1de6033d7575a",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "609e59193fc6d9dd323f1c6ae1fdd721f1c79680",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "a11a12a9880ab37342b73c93cfe1a3ada02ff0db",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "f231d5d001ec75f5886c02d496a4c79edc383d45",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "dbe3e911a59bda6de96e7cae387ff882c2c177fa",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "cdf79bd2e1ecb3cc75631c73d8f4149be6019a52",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            },
            {
              "lessThan": "71203f68c7749609d7fc8ae6ad054bdedeb24f91",
              "status": "affected",
              "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/padata.h",
            "kernel/padata.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.34"
            },
            {
              "lessThan": "2.6.34",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "70708DCC-6F9D-4EFE-AF47-0CA615284AD2",
              "versionEndExcluding": "6.15.10",
              "versionStartIncluding": "2.6.34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "58182352-D7DF-4CC9-841E-03C1D852C3FB",
              "versionEndExcluding": "6.16.1",
              "versionStartIncluding": "6.16",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npadata: Fix pd UAF once and for all\n\nThere is a race condition/UAF in padata_reorder that goes back\nto the initial commit.  A reference count is taken at the start\nof the process in padata_do_parallel, and released at the end in\npadata_serial_worker.\n\nThis reference count is (and only is) required for padata_replace\nto function correctly.  If padata_replace is never called then\nthere is no issue.\n\nIn the function padata_reorder which serves as the core of padata,\nas soon as padata is added to queue-\u003eserial.list, and the associated\nspin lock released, that padata may be processed and the reference\ncount on pd would go away.\n\nFix this by getting the next padata before the squeue-\u003eserial lock\nis released.\n\nIn order to make this possible, simplify padata_reorder by only\ncalling it once the next padata arrives."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: padata: Arregla pd UAF de una vez por todas Hay una condici\u00f3n de ejecuci\u00f3n/UAF en padata_reorder que se remonta a la confirmaci\u00f3n inicial. Se toma un recuento de referencias al inicio del proceso en padata_do_parallel y se libera al final en padata_serial_worker. Este recuento de referencias es (y solo es) necesario para que padata_replace funcione correctamente. Si nunca se llama a padata_replace, no hay problema. En la funci\u00f3n padata_reorder que sirve como n\u00facleo de padata, tan pronto como padata se agrega a queue-\u0026gt;serial.list y se libera el bloqueo de giro asociado, ese padata puede procesarse y el recuento de referencias en pd desaparecer\u00eda. Arregla esto obteniendo el siguiente padata antes de que se libere el bloqueo squeue-\u0026gt;serial. Para que esto sea posible, simplifica padata_reorder llam\u00e1ndolo solo una vez que llega el siguiente padata."
    }
  ],
  "id": "CVE-2025-38584",
  "lastModified": "2026-06-17T09:17:09.760",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-08-19T17:15:35.723",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/609e59193fc6d9dd323f1c6ae1fdd721f1c79680"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/71203f68c7749609d7fc8ae6ad054bdedeb24f91"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/73f132e60857038416540c3599b1de6033d7575a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a11a12a9880ab37342b73c93cfe1a3ada02ff0db"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a2048e475e22b13dc3e53d485b7e6e11464ed9a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cdf79bd2e1ecb3cc75631c73d8f4149be6019a52"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/dbe3e911a59bda6de96e7cae387ff882c2c177fa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f231d5d001ec75f5886c02d496a4c79edc383d45"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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