{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-12725", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-06-19T14:44:05.921Z", "datePublished": "2026-06-22T13:55:05.406Z", "dateUpdated": "2026-06-22T14:12:03.767Z"}, "containers": {"cna": {"title": "Dnsmasq: dnsmasq: heap buffer overflow in log_query() when logging unsupported ds/dnskey replies", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and\nquery logging are both enabled, logging of DS or DNSKEY replies containing\nunsupported algorithm or digest types can cause dnsmasq to write past the end\nof an internal logging buffer. A remote attacker able to supply such a DNS\nresponse may crash the dnsmasq process, resulting in denial of service."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "dnsmasq", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:10"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "dnsmasq", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:enterprise_linux:6"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "dnsmasq", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:enterprise_linux:7"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "dnsmasq", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "dnsmasq", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhcos", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-12725", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490763", "name": "RHBZ#2490763", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-04-21T21:14:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "description": "Heap-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-122: Heap-based Buffer Overflow", "workarounds": [{"lang": "en", "value": "Mitigate this issue by updating to a version of dnsmasq that includes the\nupstream fix (commit 36d081e37477027fd721fea498f3760f529034ad), or by\ndisabling query logging if DNSSEC validation must remain enabled. After\nchanging the configuration, restart the dnsmasq service for the changes to\ntake effect."}], "timeline": [{"lang": "en", "time": "2026-06-19T14:38:57.965Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-04-21T21:14:00.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Yiwei Hou (UC Berkeley) for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-06-22T14:12:03.767Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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