CVE-2026-12246 (GCVE-0-2026-12246)

Vulnerability from cvelistv5 – Published: 2026-06-25 05:24 – Updated: 2026-06-25 05:24
VLAI
Title
Out of bounds stack write with crafted APL RR
Summary
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.
Severity
7.2 (High)
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
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
NLnet Labs NSD Affected: 4.14.0 , < 4.14.3 (semver)
Create a notification for this product.
Date Public
2026-06-25 00:00
Credits
Qifan Zhang from Palo Alto Networks Haruki Oyama from Waseda University zhangph
Show details on NVD website
To clipboard 

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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "NSD",
          "vendor": "NLnet Labs",
          "versions": [
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              "lessThan": "4.14.3",
              "status": "affected",
              "version": "4.14.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Qifan Zhang from Palo Alto Networks"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Haruki Oyama from Waseda University"
        },
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          "lang": "en",
          "type": "finder",
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        }
      ],
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      "descriptions": [
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          "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": [
        {
          "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"
          },
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          "scenarios": [
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              "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"
            }
          ]
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "description": "CWE-120: Buffer Copy without Checking Size of Input",
              "lang": "en",
              "type": "CWE"
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            {
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      "providerMetadata": {
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        "orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
        "shortName": "NLnet Labs"
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        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "This issue is fixed starting with version 4.14.3."
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-05-28T00:00:00.000Z",
          "value": "Issue reported by Qifan Zhang"
        },
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          "lang": "en",
          "time": "2026-05-28T00:00:00.000Z",
          "value": "Issue reported by Haruki Oyama"
        },
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          "lang": "en",
          "time": "2026-06-12T00:00:00.000Z",
          "value": "NLnet Labs shares patch with Qifan Zhang and Haruki Oyama"
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          "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"
        },
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          "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"
        }
      ],
      "title": "Out of bounds stack write with crafted APL RR",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "NLnet Labs",
    "cveId": "CVE-2026-12246",
    "datePublished": "2026-06-25T05:24:29.512Z",
    "dateReserved": "2026-06-15T06:47:44.761Z",
    "dateUpdated": "2026-06-25T05:24:29.512Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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