FKIE_CVE-2026-2291

Vulnerability from fkie_nvd - Published: 2026-05-11 18:16 - Updated: 2026-06-17 10:30
Severity
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Summary
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
References
cret@cert.orghttps://github.com/NixOS/nixpkgs/pull/519082
cret@cert.orghttps://github.com/NixOS/nixpkgs/pull/519093
cret@cert.orghttps://github.com/pi-hole/FTL/releases/tag/v6.6.2
cret@cert.orghttps://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
cret@cert.orghttps://thekelleys.org.uk/dnsmasq/CVE/
cret@cert.orghttps://www.kb.cert.org/vuls/id/471747
cret@cert.orghttps://www.suse.com/security/cve/CVE-2026-2291.html
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "dnsmasq",
          "vendor": "dnsmasq",
          "versions": [
            {
              "lessThan": "2.92rel2",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS."
    }
  ],
  "id": "CVE-2026-2291",
  "lastModified": "2026-06-17T10:30:43.913",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-2291",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-13T12:38:54.623336Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-11T18:16:31.363",
  "references": [
    {
      "source": "cret@cert.org",
      "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",
      "url": "https://www.suse.com/security/cve/CVE-2026-2291.html"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Awaiting Analysis"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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