FKIE_CVE-2024-36891

Vulnerability from fkie_nvd - Published: 2024-05-30 16:15 - Updated: 2026-06-17 07:37
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix mas_empty_area_rev() null pointer dereference Currently the code calls mas_start() followed by mas_data_end() if the maple state is MA_START, but mas_start() may return with the maple state node == NULL. This will lead to a null pointer dereference when checking information in the NULL node, which is done in mas_data_end(). Avoid setting the offset if there is no node by waiting until after the maple state is checked for an empty or single entry state. A user could trigger the events to cause a kernel oops by unmapping all vmas to produce an empty maple tree, then mapping a vma that would cause the scenario described above.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486ccPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cfPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486ccPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/maple_tree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "883e5d542bbdddbddeba60250cb482baf3ae2415",
              "status": "affected",
              "version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
              "versionType": "git"
            },
            {
              "lessThan": "6c9c7c1e63b198a8b979ad963eb21410f10ccb00",
              "status": "affected",
              "version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
              "versionType": "git"
            },
            {
              "lessThan": "f3956791cf526540addd3295e4c1e0f0442486cc",
              "status": "affected",
              "version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
              "versionType": "git"
            },
            {
              "lessThan": "955a923d2809803980ff574270f81510112be9cf",
              "status": "affected",
              "version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "lib/maple_tree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "910CE724-0711-4456-AE26-78D967455C4C",
              "versionEndExcluding": "6.6.31",
              "versionStartIncluding": "6.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A6B920C-8D8F-4130-86B4-AD334F4CF2E3",
              "versionEndExcluding": "6.8.10",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmaple_tree: fix mas_empty_area_rev() null pointer dereference\n\nCurrently the code calls mas_start() followed by mas_data_end() if the\nmaple state is MA_START, but mas_start() may return with the maple state\nnode == NULL.  This will lead to a null pointer dereference when checking\ninformation in the NULL node, which is done in mas_data_end().\n\nAvoid setting the offset if there is no node by waiting until after the\nmaple state is checked for an empty or single entry state.\n\nA user could trigger the events to cause a kernel oops by unmapping all\nvmas to produce an empty maple tree, then mapping a vma that would cause\nthe scenario described above."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: maple_tree: corrige la desreferencia del puntero nulo mas_empty_area_rev() Actualmente el c\u00f3digo llama a mas_start() seguido de mas_data_end() si el estado del arce es MA_START, pero mas_start() puede regresar con el estado del arce nodo == NULL. Esto dar\u00e1 lugar a una desreferencia del puntero nulo al verificar la informaci\u00f3n en el nodo NULL, lo cual se realiza en mas_data_end(). Evite establecer el desplazamiento si no hay ning\u00fan nodo esperando hasta que se verifique el estado del arce para detectar un estado vac\u00edo o de entrada \u00fanica. Un usuario podr\u00eda desencadenar los eventos para causar un kernel ups al desasignar todos los vmas para producir un \u00e1rbol de arce vac\u00edo y luego mapear un vma que causar\u00eda el escenario descrito anteriormente."
    }
  ],
  "id": "CVE-2024-36891",
  "lastModified": "2026-06-17T07:37:17.273",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-36891",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-06-10T18:49:50.432549Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-30T16:15:12.603",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486cc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486cc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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