CVE-2026-65062

Full vulnerability record from the local CVENow database.

Description

Data::SortedSet::Shared versions before 0.03 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW. The segment is created in sortedset.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing. A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.

Severity

LOW

CVSS score

3.8 (v3.1)

Vulnerability status

Deferred

Source identifier

9b29abf9-4ab0-4765-b253-1875cd9b441e

Published

2026-07-21 20:17:05.190000

Last modified

2026-10-24 19:10:00.127000

View original CVE JSON

{
  "id": "CVE-2026-65062",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "published": "2026-07-21T20:17:05.190",
  "lastModified": "2026-10-24T19:10:00.127",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Data::SortedSet::Shared versions before 0.03 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.\n\nThe segment is created in sortedset.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing.\n\nA \"Shared\" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open."
    },
    {
      "lang": "es",
      "value": "Las versiones de Data::SortedSet::Shared anteriores a la 0.03 para Perl crean un archivo de respaldo mmap legible por todos y lo abren sin O_EXCL ni O_NOFOLLOW.\n\nEl segmento se crea en sortedset.h con open(path, O_RDWR|O_CREAT, 0666). El modo es 0666, por lo que bajo la umask predeterminada 022 el archivo se crea con el modo 0644 (legible por todos). O_NOFOLLOW está ausente, por lo que se sigue un enlace simbólico plantado en la ruta, y O_EXCL está ausente, por lo que la apertura utiliza silenciosamente un archivo pre-plantado en lugar de fallar.\n\nUn segmento ’Shared’ reside naturalmente en un directorio compartido como /tmp o /dev/shm, donde cualquier usuario local puede leer las cargas útiles IPC almacenadas en el segmento legible por todos, y un archivo pre-plantado o enlace simbólico en la ruta permite a un atacante local ganar una carrera de pre-creación o redirigir la apertura."
    }
  ],
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "vendor": "EGOR",
          "product": "Data::SortedSet::Shared",
          "defaultStatus": "unaffected",
          "collectionURL": "https://cpan.org/modules",
          "packageName": "Data-SortedSet-Shared",
          "programFiles": [
            "sortedset.h"
          ],
          "repo": "https://github.com/vividsnow/perl5-data-sortedset-shared",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.03",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "baseScore": 3.8,
          "baseSeverity": "LOW",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-23T12:49:13.724053Z",
          "id": "CVE-2026-65062",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        },
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://metacpan.org/release/EGOR/Data-SortedSet-Shared-0.03/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/EGOR/Data-SortedSet-Shared-0.03/diff/EGOR/Data-SortedSet-Shared-0.02#sortedset.h",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ]
}