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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-12246",
        "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
        "state": "PUBLISHED",
        "assignerShortName": "NLnet Labs",
        "dateReserved": "2026-06-15T06:47:44.761Z",
        "datePublished": "2026-06-25T05:24:29.512Z",
        "dateUpdated": "2026-06-25T12:42:05.428Z"
    },
    "containers": {
        "cna": {
            "title": "Out of bounds stack write with crafted APL RR",
            "references": [
                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "This issue is fixed starting with version 4.14.3."
                }
            ],
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "NSD",
                    "vendor": "NLnet Labs",
                    "versions": [
                        {
                            "version": "4.14.0",
                            "lessThan": "4.14.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Qifan Zhang from Palo Alto Networks"
                },
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Haruki Oyama from Waseda University"
                },
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "zhangph"
                }
            ],
            "timeline": [
                {
                    "lang": "en",
                    "time": "2026-05-28T00:00:00.000Z",
                    "value": "Issue reported by Qifan Zhang"
                },
                {
                    "lang": "en",
                    "time": "2026-05-28T00:00:00.000Z",
                    "value": "Issue reported by Haruki Oyama"
                },
                {
                    "lang": "en",
                    "time": "2026-06-12T00:00:00.000Z",
                    "value": "NLnet Labs shares patch with Qifan Zhang and Haruki Oyama"
                },
                {
                    "lang": "en",
                    "time": "2026-06-12T00:00:00.000Z",
                    "value": "Haruki Oyama verifies patch"
                },
                {
                    "lang": "en",
                    "time": "2026-06-15T00:00:00.000Z",
                    "value": "Qifan Zhang verifies patch"
                },
                {
                    "lang": "en",
                    "time": "2026-06-16T00:00:00.000Z",
                    "value": "Issue reported by zhangph"
                },
                {
                    "lang": "en",
                    "time": "2026-06-12T00:00:00.000Z",
                    "value": "NLnet Labs shares patch with zhangph"
                },
                {
                    "lang": "en",
                    "time": "2026-06-25T00:00:00.000Z",
                    "value": "Fix released with version 4.14.3"
                }
            ],
            "datePublic": "2026-06-25T00:00:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes."
                }
            ],
            "metrics": [
                {
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "Processing of a zone containing a crafted APL can crash NSD when writing the zone to disk. These zones can be provided by a trusted primary"
                        }
                    ],
                    "cvssV4_0": {
                        "baseScore": 7.2,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    },
                    "format": "CVSS"
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-120",
                            "description": "CWE-120: Buffer Copy without Checking Size of Input",
                            "lang": "en",
                            "type": "CWE"
                        },
                        {
                            "cweId": "CWE-20",
                            "description": "CWE-20: Improper Input Validation",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
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                "shortName": "NLnet Labs",
                "dateUpdated": "2026-06-25T05:24:29.512Z"
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                "metrics": [
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-25T12:41:56.092027Z",
                                "id": "CVE-2026-12246",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
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                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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