FKIE_CVE-2026-27831

Vulnerability from fkie_nvd - Published: 2026-02-26 01:16 - Updated: 2026-06-17 10:27
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. Version 1.4 contains a patch for the issue.
References
security-advisories@github.comhttps://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4
security-advisories@github.comhttps://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4
security-advisories@github.comhttps://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff
security-advisories@github.comhttps://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "rldns",
          "vendor": "bluedragonsecurity",
          "versions": [
            {
              "status": "affected",
              "version": "= 1.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. Version 1.4 contains a patch for the issue."
    },
    {
      "lang": "es",
      "value": "rldns es un servidor DNS de c\u00f3digo abierto. La versi\u00f3n 2.3 tiene una lectura fuera de l\u00edmites basada en el heap que conduce a denegaci\u00f3n de servicio. La versi\u00f3n 1.4 contiene un parche para el problema."
    }
  ],
  "id": "CVE-2026-27831",
  "lastModified": "2026-06-17T10:27:45.460",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27831",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-26T15:14:43.983653Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-26T01:16:24.770",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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