CVE-2026-3104 (GCVE-0-2026-3104)
Vulnerability from cvelistv5
Published
2026-03-25 13:29
Modified
2026-03-25 14:56
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Summary
A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
Impacted products
Vendor Product Version
ISC BIND 9 Version: 9.20.0   <
Version: 9.21.0   <
Version: 9.20.9-S1   <
Patch: 9.18.0
Patch: 9.18.11-S1
Create a notification for this product.
Show details on NVD website


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        "metrics": [
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              "content": {
                "id": "CVE-2026-3104",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-25T14:56:20.362810Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-25T14:56:26.373Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "9.20.20",
              "status": "affected",
              "version": "9.20.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.21.19",
              "status": "affected",
              "version": "9.21.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.20.20-S1",
              "status": "affected",
              "version": "9.20.9-S1",
              "versionType": "custom"
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              "lessThanOrEqual": "9.18.46",
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              "version": "9.18.11-S1",
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      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
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              ],
              "operator": "OR"
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          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Vitaly Simonovich for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2026-03-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1.\nBIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected."
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          "value": "We are not aware of any active exploits."
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      "impacts": [
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              "lang": "en",
              "value": "If a BIND resolver is asked to query a specially crafted domain, memory will not be recovered by `named`. This can cause unbounded growth of Resident Set Size (RSS) memory, which may lead to an out-of-memory condition. Additionally, `named` will exit with an assertion failure if a shutdown or reload is attempted."
            }
          ]
        }
      ],
      "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"
          }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-772",
              "description": "CWE-772 Missing Release of Resource after Effective Lifetime",
              "lang": "en",
              "type": "CWE"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T13:29:19.494Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
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          "name": "CVE-2026-3104",
          "tags": [
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          "url": "https://kb.isc.org/docs/cve-2026-3104"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/bind9/9.20.21"
        },
        {
          "tags": [
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          "url": "https://downloads.isc.org/isc/bind9/9.21.20"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.21, 9.21.20, or 9.20.21-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Memory leak in code preparing DNSSEC proofs of non-existence",
      "workarounds": [
        {
          "lang": "en",
          "value": "No workarounds known."
        }
      ],
      "x_generator": {
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    "cveId": "CVE-2026-3104",
    "datePublished": "2026-03-25T13:29:19.494Z",
    "dateReserved": "2026-02-24T10:04:57.917Z",
    "dateUpdated": "2026-03-25T14:56:26.373Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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