FKIE_CVE-2024-49983

Vulnerability from fkie_nvd - Published: 2024-10-21 18:15 - Updated: 2026-08-04 11:21
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: drop ppath from ext4_ext_replay_update_ex() to avoid double-free When calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(), the 'ppath' is updated but it is the 'path' that is freed, thus potentially triggering a double-free in the following process: ext4_ext_replay_update_ex ppath = path ext4_force_split_extent_at(&ppath) ext4_split_extent_at ext4_ext_insert_extent ext4_ext_create_new_leaf ext4_ext_grow_indepth ext4_find_extent if (depth > path[0].p_maxdepth) kfree(path) ---> path First freed *orig_path = path = NULL ---> null ppath kfree(path) ---> path double-free !!! So drop the unnecessary ppath and use path directly to avoid this problem. And use ext4_find_extent() directly to update path, avoiding unnecessary memory allocation and freeing. Also, propagate the error returned by ext4_find_extent() instead of using strange error codes.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b558006d98b7b0b730027be0ee98973dd10ee0dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ff710662e8d86a63a39b334e9ca0cb10e5c14b0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6367d3f04c69e2b8770b8137bd800e0784b0abbcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63adc9016917e6970fb0104ee5fd6770f02b2d80Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c26d9e53e5fbacda0732a577e97c5a5b7882aafPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a34bed978364114390162c27e50fca50791c568dPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/extents.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8c26d9e53e5fbacda0732a577e97c5a5b7882aaf",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            },
            {
              "lessThan": "a34bed978364114390162c27e50fca50791c568d",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            },
            {
              "lessThan": "6367d3f04c69e2b8770b8137bd800e0784b0abbc",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            },
            {
              "lessThan": "1b558006d98b7b0b730027be0ee98973dd10ee0d",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            },
            {
              "lessThan": "3ff710662e8d86a63a39b334e9ca0cb10e5c14b0",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            },
            {
              "lessThan": "63adc9016917e6970fb0104ee5fd6770f02b2d80",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            },
            {
              "lessThan": "5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95",
              "status": "affected",
              "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/extents.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.227",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "658E9248-9CAC-4A1E-A483-039DF6CCAF8C",
              "versionEndExcluding": "5.10.227",
              "versionStartIncluding": "5.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C",
              "versionEndExcluding": "5.15.168",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE",
              "versionEndExcluding": "6.1.113",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E90B9576-56C4-47BC-AAB0-C5B2D438F5D0",
              "versionEndExcluding": "6.6.55",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4C16BCE0-FFA0-4599-BE0A-1FD65101C021",
              "versionEndExcluding": "6.10.14",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9",
              "versionEndExcluding": "6.11.3",
              "versionStartIncluding": "6.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free\n\nWhen calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(),\nthe \u0027ppath\u0027 is updated but it is the \u0027path\u0027 that is freed, thus potentially\ntriggering a double-free in the following process:\n\next4_ext_replay_update_ex\n  ppath = path\n  ext4_force_split_extent_at(\u0026ppath)\n    ext4_split_extent_at\n      ext4_ext_insert_extent\n        ext4_ext_create_new_leaf\n          ext4_ext_grow_indepth\n            ext4_find_extent\n              if (depth \u003e path[0].p_maxdepth)\n                kfree(path)                 ---\u003e path First freed\n                *orig_path = path = NULL    ---\u003e null ppath\n  kfree(path)                               ---\u003e path double-free !!!\n\nSo drop the unnecessary ppath and use path directly to avoid this problem.\nAnd use ext4_find_extent() directly to update path, avoiding unnecessary\nmemory allocation and freeing. Also, propagate the error returned by\next4_find_extent() instead of using strange error codes."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: eliminar ppath de ext4_ext_replay_update_ex() para evitar una doble liberaci\u00f3n Al llamar a ext4_force_split_extent_at() en ext4_ext_replay_update_ex(), se actualiza \u0027ppath\u0027 pero es \u0027path\u0027 el que se libera, lo que potencialmente desencadena una doble liberaci\u00f3n en el siguiente proceso: ext4_ext_replay_update_ex ppath = path ext4_force_split_extent_at(\u0026amp;ppath) ext4_split_extent_at ext4_ext_insert_extent ext4_ext_create_new_leaf ext4_ext_grow_indepth ext4_find_extent if (depth \u0026gt; path[0].p_maxdepth) kfree(path) ---\u0026gt; path Primero liberado *orig_path = path = NULL ---\u0026gt; null ppath kfree(path) ---\u0026gt; path double-free !!! Por lo tanto, elimine el ppath innecesario y use path directamente para evitar este problema. Y use ext4_find_extent() directamente para actualizar path, evitando la asignaci\u00f3n y liberaci\u00f3n de memoria innecesaria. Adem\u00e1s, propague el error devuelto por ext4_find_extent() en lugar de usar c\u00f3digos de error extra\u00f1os."
    }
  ],
  "id": "CVE-2024-49983",
  "lastModified": "2026-08-04T11:21:05.523",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-49983",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-10-22T13:32:15.569255Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-10-21T18:15:18.797",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1b558006d98b7b0b730027be0ee98973dd10ee0d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3ff710662e8d86a63a39b334e9ca0cb10e5c14b0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6367d3f04c69e2b8770b8137bd800e0784b0abbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/63adc9016917e6970fb0104ee5fd6770f02b2d80"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8c26d9e53e5fbacda0732a577e97c5a5b7882aaf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a34bed978364114390162c27e50fca50791c568d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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