CVE-2026-59147

{
  "id": "CVE-2026-59147",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "published": "2026-07-21T20:17:03.513",
  "lastModified": "2026-10-24T19:10:00.127",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Data::DisjointSet::Shared versions before 0.02 for Perl allow out-of-bounds reads and writes via an unvalidated parent index in dsu_find.\n\nThe attach-time validator dsu_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. dsu_find walks and path-compresses parent[x] with x a raw file-stored index never bounded against the node count, so both the read and the compression write-back land out of bounds.\n\nA local peer that can write the backing file can leave the header valid while poisoning the parent array, so the next find or union both reads and writes through an out-of-bounds parent index, corrupting memory or crashing the process."
    },
    {
      "lang": "es",
      "value": "Las versiones de Data::DisjointSet::Shared anteriores a la 0.02 para Perl permiten lecturas y escrituras fuera de límites a través de un índice padre no validado en dsu_find.\n\nEl validador en tiempo de adjunción dsu_validate_header comprueba los escalares del encabezado y la disposición de la región contra el tamaño del archivo, pero no valida el contenido del array en el que luego confía. dsu_find recorre y comprime la ruta de parent[x], siendo x un índice sin procesar almacenado en el archivo nunca acotado contra el recuento de nodos, por lo que tanto la lectura como la reescritura de la compresión caen fuera de límites.\n\nUn par local que puede escribir el archivo de respaldo puede dejar el encabezado válido mientras envenena el array padre, por lo que la siguiente búsqueda o unión lee y escribe a través de un índice padre fuera de límites, corrompiendo la memoria o bloqueando el proceso."
    }
  ],
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "vendor": "EGOR",
          "product": "Data::DisjointSet::Shared",
          "defaultStatus": "unaffected",
          "collectionURL": "https://cpan.org/modules",
          "packageName": "Data-DisjointSet-Shared",
          "programFiles": [
            "dsu.h"
          ],
          "programRoutines": [
            {
              "name": "dsu_find"
            }
          ],
          "repo": "https://github.com/vividsnow/perl5-data-disjointset-shared",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.02",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-23T12:17:00.916862Z",
          "id": "CVE-2026-59147",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        },
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/diff/EGOR/Data-DisjointSet-Shared-0.01#dsu.h",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ]
}