{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5172", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2026-03-30T15:54:52.205Z", "datePublished": "2026-05-11T16:48:46.219Z", "dateUpdated": "2026-05-11T18:29:19.327Z"}, "containers": {"cna": {"title": "CVE-2026-5172", "descriptions": [{"lang": "en", "value": "A buffer overflow in dnsmasq\u2019s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record\u2019s end."}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "dnsmasq", "product": "dnsmasq", "versions": [{"status": "affected", "version": "2.92rel2"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-787: Out-of-bounds Write"}]}], "references": [{"url": "https://www.kb.cert.org/vuls/id/471747"}, {"url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"}, {"url": "https://thekelleys.org.uk/dnsmasq/CVE/"}, {"url": "https://github.com/NixOS/nixpkgs/pull/519082"}, {"url": "https://github.com/NixOS/nixpkgs/pull/519093"}], "x_generator": {"engine": "VINCE 3.0.39", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-5172"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-05-11T18:29:19.327Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A buffer overflow in dnsmasq\u2019s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record\u2019s end."}], "id": "CVE-2026-5172", "lastModified": "2026-05-11T18:16:41.920", "metrics": {}, "published": "2026-05-11T18:16:41.920", "references": [{"source": "cret@cert.org", "url": "https://thekelleys.org.uk/dnsmasq/"}, {"source": "cret@cert.org", "url": "https://www.kb.cert.org/vuls/id/471747"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "2.93"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "dnsmasq", "source": "cna", "vendor": "dnsmasq"}, "product": "dnsmasq", "vendor": "dnsmasq"}], "created": "2026-05-11T18:45:25.407863+00:00", "title": "Heap Out-of-Bounds Read in dnsmasq via Malformed DNS Response", "updated": "2026-05-11T18:45:25.662961+00:00", "vendors": ["dnsmasq", "dnsmasq$PRODUCT$dnsmasq"], "weaknesses": ["CWE-125"]}