FKIE_CVE-2025-38580

Vulnerability from fkie_nvd - Published: 2025-08-19 17:15 - Updated: 2026-07-30 06:23
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: ext4: fix inode use after free in ext4_end_io_rsv_work() In ext4_io_end_defer_completion(), check if io_end->list_vec is empty to avoid adding an io_end that requires no conversion to the i_rsv_conversion_list, which in turn prevents starting an unnecessary worker. An ext4_emergency_state() check is also added to avoid attempting to abort the journal in an emergency state. Additionally, ext4_put_io_end_defer() is refactored to call ext4_io_end_defer_completion() directly instead of being open-coded. This also prevents starting an unnecessary worker when EXT4_IO_END_FAILED is set but data_err=abort is not enabled. This ensures that the check in ext4_put_io_end_defer() is consistent with the check in ext4_end_bio(). Otherwise, we might add an io_end to the i_rsv_conversion_list and then call ext4_finish_bio(), after which the inode could be freed before ext4_end_io_rsv_work() is called, triggering a use-after-free issue.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/469c44e66e2110054949609dde095788320139d0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac999862b98a0f49e858e509f776be51406f1e77Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c678bdc998754589cea2e6afab9401d7d8312ac4Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/page-io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ac999862b98a0f49e858e509f776be51406f1e77",
              "status": "affected",
              "version": "ce51afb8cc5e1867ea0dfdf5e92ddbe31a1fad5d",
              "versionType": "git"
            },
            {
              "lessThan": "469c44e66e2110054949609dde095788320139d0",
              "status": "affected",
              "version": "ce51afb8cc5e1867ea0dfdf5e92ddbe31a1fad5d",
              "versionType": "git"
            },
            {
              "lessThan": "c678bdc998754589cea2e6afab9401d7d8312ac4",
              "status": "affected",
              "version": "ce51afb8cc5e1867ea0dfdf5e92ddbe31a1fad5d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/page-io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "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": "2EA7D98E-F04C-44BE-AC61-F5ADC4C88EC6",
              "versionEndExcluding": "6.15.10",
              "versionStartIncluding": "6.15",
              "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\next4: fix inode use after free in ext4_end_io_rsv_work()\n\nIn ext4_io_end_defer_completion(), check if io_end-\u003elist_vec is empty to\navoid adding an io_end that requires no conversion to the\ni_rsv_conversion_list, which in turn prevents starting an unnecessary\nworker. An ext4_emergency_state() check is also added to avoid attempting\nto abort the journal in an emergency state.\n\nAdditionally, ext4_put_io_end_defer() is refactored to call\next4_io_end_defer_completion() directly instead of being open-coded.\nThis also prevents starting an unnecessary worker when EXT4_IO_END_FAILED\nis set but data_err=abort is not enabled.\n\nThis ensures that the check in ext4_put_io_end_defer() is consistent with\nthe check in ext4_end_bio(). Otherwise, we might add an io_end to the\ni_rsv_conversion_list and then call ext4_finish_bio(), after which the\ninode could be freed before ext4_end_io_rsv_work() is called, triggering\na use-after-free issue."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: se corrige el uso de inodo use after free en ext4_end_io_rsv_work() En ext4_io_end_defer_completion(), se comprueba si io_end-\u0026gt;list_vec est\u00e1 vac\u00edo para evitar a\u00f1adir un io_end que no requiere conversi\u00f3n a i_rsv_conversion_list, lo que a su vez impide iniciar un trabajador innecesario. Tambi\u00e9n se a\u00f1ade una comprobaci\u00f3n ext4_emergency_state() para evitar intentar abortar el diario en un estado de emergencia. Adem\u00e1s, ext4_put_io_end_defer() se refactoriza para llamar a ext4_io_end_defer_completion() directamente en lugar de estar en c\u00f3digo abierto. Esto tambi\u00e9n impide iniciar un trabajador innecesario cuando EXT4_IO_END_FAILED est\u00e1 configurado pero data_err=abort no est\u00e1 habilitado. Esto garantiza que la comprobaci\u00f3n en ext4_put_io_end_defer() sea coherente con la comprobaci\u00f3n en ext4_end_bio(). De lo contrario, podr\u00edamos agregar un io_end a i_rsv_conversion_list y luego llamar a ext4_finish_bio(), despu\u00e9s de lo cual el inodo podr\u00eda liberarse antes de que se llame a ext4_end_io_rsv_work(), lo que desencadenar\u00eda un problema de use-after-free."
    }
  ],
  "id": "CVE-2025-38580",
  "lastModified": "2026-07-30T06:23:28.383",
  "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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": "2025-08-19T17:15:35.160",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/469c44e66e2110054949609dde095788320139d0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ac999862b98a0f49e858e509f776be51406f1e77"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c678bdc998754589cea2e6afab9401d7d8312ac4"
    }
  ],
  "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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