CVE-2026-59139

{
  "id": "CVE-2026-59139",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "published": "2026-07-21T19:17:11.467",
  "lastModified": "2026-10-24T19:10:00.127",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process."
    },
    {
      "lang": "es",
      "value": "Las versiones de Data::ReqRep::Shared anteriores a 0.05 para Perl permiten una lectura fuera de límites a través de un desplazamiento y una longitud de arena no validados en reqrep_recv_locked.\n\nEl validador en tiempo de adjunción reqrep_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. reqrep_recv_locked realiza memcpy(copy_buf, req_arena + arena_off, len) con arena_off y len leídos directamente del segmento mapeado en memoria y nunca acotados contra la capacidad de la arena (req_arena_cap).\n\nUn par local que puede escribir el archivo de respaldo puede dejar el encabezado válido mientras envenena el desplazamiento y la longitud de una ranura de solicitud, de modo que recibir la solicitud copia un desplazamiento y una longitud controlados por el archivo fuera de la arena, leyendo memoria adyacente o bloqueando el proceso."
    }
  ],
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "vendor": "EGOR",
          "product": "Data::ReqRep::Shared",
          "defaultStatus": "unaffected",
          "collectionURL": "https://cpan.org/modules",
          "packageName": "Data-ReqRep-Shared",
          "programFiles": [
            "reqrep.h"
          ],
          "programRoutines": [
            {
              "name": "reqrep_recv_locked"
            }
          ],
          "repo": "https://github.com/vividsnow/perl5-data-reqrep-shared",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.05",
              "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:N/A:H",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-22T19:16:20.997158Z",
          "id": "CVE-2026-59139",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ]
}