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vuln-cve/data/2026/33xxx/CVE-2026-33630.json
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{
"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"
}
}
]
}
}