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CVE-2026-4891

Estado: Pendiente de análisisMedia (5.3)—

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Dnsmasq — DnsmasqAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-4891",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-11T18:27:33.459839Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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        "cvssData": {
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          "userInteraction": "NONE",
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          "product": "Red Hat OpenShift Container Platform 4.19",
          "versions": [
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  ],
  "published": "2026-05-11T18:16:41.380",
  "references": [
    {
      "url": "https://github.com/NixOS/nixpkgs/pull/519082",
      "source": "cret@cert.org"
    },
    {
      "url": "https://github.com/NixOS/nixpkgs/pull/519093",
      "source": "cret@cert.org"
    },
    {
      "url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2",
      "source": "cret@cert.org"
    },
    {
      "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html",
      "source": "cret@cert.org"
    },
    {
      "url": "https://thekelleys.org.uk/dnsmasq/CVE/",
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.kb.cert.org/vuls/id/471747",
      "source": "cret@cert.org"
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    },
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      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet."
    }
  ],
  "lastModified": "2026-08-25T13:19:21.527",
  "sourceIdentifier": "cret@cert.org"
}