{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-33630",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-03-23T14:24:11.618Z",
        "datePublished": "2026-09-03T18:42:28.783Z",
        "dateUpdated": "2026-09-05T02:00:52.338Z"
    },
    "containers": {
        "cna": {
            "title": "c-ares : Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCP",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-415",
                            "lang": "en",
                            "description": "CWE-415: Double Free",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-416",
                            "lang": "en",
                            "description": "CWE-416: Use After Free",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "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"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/c-ares/c-ares/security/advisories/GHSA-6wfj-rwm7-3542",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-6wfj-rwm7-3542"
                },
                {
                    "name": "https://github.com/c-ares/c-ares/pull/1237",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/c-ares/c-ares/pull/1237"
                },
                {
                    "name": "https://github.com/c-ares/c-ares/commit/1fa3b86a0b8d18fe7b60f3228a01d770feb026bc",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/c-ares/c-ares/commit/1fa3b86a0b8d18fe7b60f3228a01d770feb026bc"
                },
                {
                    "name": "https://github.com/c-ares/c-ares/commit/d823199b688052dcdc1646f2ab4cb8c16b1c644a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/c-ares/c-ares/commit/d823199b688052dcdc1646f2ab4cb8c16b1c644a"
                },
                {
                    "name": "https://github.com/c-ares/c-ares/releases/tag/v1.34.7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/c-ares/c-ares/releases/tag/v1.34.7"
                }
            ],
            "affected": [
                {
                    "vendor": "c-ares",
                    "product": "c-ares",
                    "versions": [
                        {
                            "version": ">= 1.32.3, < 1.34.7",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-03T20:04:36.574Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7."
                }
            ],
            "source": {
                "advisory": "GHSA-6wfj-rwm7-3542",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-05T02:00:43.010024Z",
                                "id": "CVE-2026-33630",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-09-05T02:00:52.338Z"
                }
            }
        ]
    }
}