{"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": "2026-09-21T20:48:59.663Z"}, "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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-18T20:13:18.897117Z", "id": "CVE-2026-69184", "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": "2026-09-21T20:48:59.663Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-69184", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-18T20:13:18.897117Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-18T20:13:19.942Z"}}], "cna": {"title": "c-ares: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains", "source": {"advisory": "GHSA-pjmc-gx33-gc76", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "c-ares", "product": "c-ares", "versions": [{"status": "affected", "version": "< 1.34.7"}]}], "references": [{"url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76", "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/pull/1164", "name": "https://github.com/c-ares/c-ares/pull/1164", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/c-ares/c-ares/pull/1210", "name": "https://github.com/c-ares/c-ares/pull/1210", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b", "name": "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea", "name": "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/c-ares/c-ares/releases/tag/v1.34.7", "name": "https://github.com/c-ares/c-ares/releases/tag/v1.34.7", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-407", "description": "CWE-407: Inefficient Algorithmic Complexity"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T17:26:52.210Z"}}}, "cveMetadata": {"cveId": "CVE-2026-69184", "state": "PUBLISHED", "dateUpdated": "2026-09-21T20:48:59.663Z", "dateReserved": "2026-08-03T16:00:23.482Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-18T17:26:52.210Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "c-ares", "vendor": "c-ares", "versions": [{"status": "affected", "version": "< 1.34.7"}]}], "source": "security-advisories@github.com"}], "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": "2026-09-21T21:17:08.950", "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": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69184", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-18T20:13:18.897117Z", "version": "2.0.3"}}]}, "published": "2026-09-18T18:17:11.477", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b"}, {"source": "security-advisories@github.com", "url": "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea"}, {"source": "security-advisories@github.com", "url": "https://github.com/c-ares/c-ares/pull/1164"}, {"source": "security-advisories@github.com", "url": "https://github.com/c-ares/c-ares/pull/1210"}, {"source": "security-advisories@github.com", "url": "https://github.com/c-ares/c-ares/releases/tag/v1.34.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "c-ares: c-ares: CPU exhaustion denial of service via unbounded DNS name compression pointer chains", "id": "2538396", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2538396"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["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.", "A flaw was found in c-ares, an asynchronous resolver library. The 'ares_dns_name_parse()' function does not properly limit the total pointer hops or assembled name length when enforcing backward DNS compression pointers. A remote attacker, operating a malicious DNS server, can send a specially crafted DNS response containing a long descending pointer chain. This can lead to excessive CPU consumption, causing the single-threaded c-ares event loop to stall and resulting in a denial of service for DNS resolution."], "name": "CVE-2026-69184", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-18T17:26:52Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-69184\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-69184\nhttps://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b\nhttps://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea\nhttps://github.com/c-ares/c-ares/pull/1164\nhttps://github.com/c-ares/c-ares/pull/1210\nhttps://github.com/c-ares/c-ares/releases/tag/v1.34.7\nhttps://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.34.7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "c-ares", "source": "cna", "vendor": "c-ares"}, "product": "c-ares", "vendor": "c-ares"}], "created": "2026-09-19T12:00:08.779628+00:00", "updated": "2026-09-23T02:00:10.862149+00:00", "vendors": ["c-ares", "c-ares$PRODUCT$c-ares"]}