{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-69184", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-03T16:00:23.482Z", "datePublished": "2026-09-18T17:26:52.210Z", "dateUpdated": "2026-09-18T17:26:52.210Z"}, "containers": {"cna": {"title": "c-ares: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains", "problemTypes": [{"descriptions": [{"cweId": "CWE-407", "lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity", "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-pjmc-gx33-gc76", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76"}, {"name": "https://github.com/c-ares/c-ares/pull/1164", "tags": ["x_refsource_MISC"], "url": "https://github.com/c-ares/c-ares/pull/1164"}, {"name": "https://github.com/c-ares/c-ares/pull/1210", "tags": ["x_refsource_MISC"], "url": "https://github.com/c-ares/c-ares/pull/1210"}, {"name": "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b", "tags": ["x_refsource_MISC"], "url": "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b"}, {"name": "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea", "tags": ["x_refsource_MISC"], "url": "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea"}, {"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": "< 1.34.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T17:26:52.210Z"}, "descriptions": [{"lang": "en", "value": "c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long descending pointer chain and many resource records whose NAME or RDATA fields refer to the chain, causing repeated decompression work that grows quadratically with message size. A single crafted response can stall the single-threaded c-ares event loop and deny DNS resolution, without causing memory corruption or information disclosure. This issue is fixed in version 1.34.7."}], "source": {"advisory": "GHSA-pjmc-gx33-gc76", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "c-ares", "vendor": "c-ares", "versions": [{"status": "affected", "version": "< 1.34.7"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long descending pointer chain and many resource records whose NAME or RDATA fields refer to the chain, causing repeated decompression work that grows quadratically with message size. A single crafted response can stall the single-threaded c-ares event loop and deny DNS resolution, without causing memory corruption or information disclosure. This issue is fixed in version 1.34.7."}], "id": "CVE-2026-69184", "lastModified": "2026-09-18T18:17:11.477", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-09-18T18:17:11.477", "references": [{"source": "[email protected]", "url": "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b"}, {"source": "[email protected]", "url": "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea"}, {"source": "[email protected]", "url": "https://github.com/c-ares/c-ares/pull/1164"}, {"source": "[email protected]", "url": "https://github.com/c-ares/c-ares/pull/1210"}, {"source": "[email protected]", "url": "https://github.com/c-ares/c-ares/releases/tag/v1.34.7"}, {"source": "[email protected]", "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "[email protected]", "type": "Primary"}]}

{}

{}