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    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-27854",
        "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
        "state": "PUBLISHED",
        "assignerShortName": "OX",
        "dateReserved": "2026-02-24T08:46:09.373Z",
        "datePublished": "2026-03-31T12:06:46.648Z",
        "dateUpdated": "2026-04-02T13:46:22.087Z"
    },
    "containers": {
        "cna": {
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                "orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
                "shortName": "OX",
                "dateUpdated": "2026-04-02T13:46:22.087Z"
            },
            "title": "Use after free when parsing EDNS options in Lua",
            "datePublic": "2026-03-30T22:00:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Use After Free",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "PowerDNS",
                    "product": "DNSdist",
                    "collectionURL": "https://repo.powerdns.com/",
                    "packageName": "dnsdist",
                    "repo": "https://github.com/PowerDNS/pdns",
                    "modules": [
                        "EDNS options cache"
                    ],
                    "programFiles": [
                        "dnsdist.hh"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "1.9.0",
                            "lessThan": "1.9.12",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "2.0.0",
                            "lessThan": "2.0.3",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html"
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "LOW",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 4.8,
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Naoki Wakamatsu",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "Vulnogram 1.0.1"
            }
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-416",
                                "lang": "en",
                                "description": "CWE-416 Use After Free"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-31T13:12:37.483504Z",
                                "id": "CVE-2026-27854",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-03-31T13:12:40.678Z"
                }
            }
        ]
    }
}