{"api_version":"1","generated_at":"2026-06-03T01:32:18+00:00","cve":"CVE-2026-3104","urls":{"html":"https://cve.report/CVE-2026-3104","api":"https://cve.report/api/cve/CVE-2026-3104.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-3104","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-3104"},"summary":{"title":"Memory leak in code preparing DNSSEC proofs of non-existence","description":"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.","state":"PUBLISHED","assigner":"isc","published_at":"2026-03-25 14:16:36","updated_at":"2026-05-21 15:26:06"},"problem_types":["CWE-772","CWE-401","CWE-772 CWE-772 Missing Release of Resource after Effective Lifetime"],"metrics":[{"version":"3.1","source":"security-officer@isc.org","type":"Primary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"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"}}],"references":[{"url":"https://downloads.isc.org/isc/bind9/9.20.21","name":"https://downloads.isc.org/isc/bind9/9.20.21","refsource":"security-officer@isc.org","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://downloads.isc.org/isc/bind9/9.21.20","name":"https://downloads.isc.org/isc/bind9/9.21.20","refsource":"security-officer@isc.org","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://kb.isc.org/docs/cve-2026-3104","name":"https://kb.isc.org/docs/cve-2026-3104","refsource":"security-officer@isc.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-3104","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3104","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"ISC","product":"BIND 9","version":"affected 9.20.0 9.20.20 custom","platforms":[]},{"source":"CNA","vendor":"ISC","product":"BIND 9","version":"affected 9.21.0 9.21.19 custom","platforms":[]},{"source":"CNA","vendor":"ISC","product":"BIND 9","version":"affected 9.20.9-S1 9.20.20-S1 custom","platforms":[]},{"source":"CNA","vendor":"ISC","product":"BIND 9","version":"unaffected 9.18.0 9.18.46 custom","platforms":[]},{"source":"CNA","vendor":"ISC","product":"BIND 9","version":"unaffected 9.18.11-S1 9.18.46-S1 custom","platforms":[]}],"timeline":[],"solutions":[{"source":"CNA","title":"","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.","time":"","lang":"en"}],"workarounds":[{"source":"CNA","title":"","value":"No workarounds known.","time":"","lang":"en"}],"exploits":[{"source":"CNA","title":"","value":"We are not aware of any active exploits.","time":"","lang":"en"}],"credits":[{"source":"CNA","value":"ISC would like to thank Vitaly Simonovich for bringing this vulnerability to our attention.","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"3104","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"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"},{"lessThanOrEqual":"9.18.46","status":"unaffected","version":"9.18.0","versionType":"custom"},{"lessThanOrEqual":"9.18.46-S1","status":"unaffected","version":"9.18.11-S1","versionType":"custom"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*","versionEndIncluding":"9.20.20","versionStartIncluding":"9.20.0","vulnerable":true},{"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*","versionEndIncluding":"9.21.19","versionStartIncluding":"9.21.0","vulnerable":true},{"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*","versionEndIncluding":"9.20.20-S1","versionStartIncluding":"9.20.9-S1","vulnerable":true},{"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*","versionEndIncluding":"9.18.46","versionStartIncluding":"9.18.0","vulnerable":false},{"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*","versionEndIncluding":"9.18.46-S1","versionStartIncluding":"9.18.11-S1","vulnerable":false}],"operator":"OR"}]}],"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."}],"exploits":[{"lang":"en","value":"We are not aware of any active exploits."}],"impacts":[{"descriptions":[{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-772","description":"CWE-772 Missing Release of Resource after Effective Lifetime","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-03-25T13:29:19.494Z","orgId":"404fd4d2-a609-4245-b543-2c944a302a22","shortName":"isc"},"references":[{"name":"CVE-2026-3104","tags":["vendor-advisory"],"url":"https://kb.isc.org/docs/cve-2026-3104"},{"tags":["patch"],"url":"https://downloads.isc.org/isc/bind9/9.20.21"},{"tags":["patch"],"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":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"404fd4d2-a609-4245-b543-2c944a302a22","assignerShortName":"isc","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"},"nvd":{"publishedDate":"2026-03-25 14:16:36","lastModifiedDate":"2026-05-21 15:26:06","problem_types":["CWE-772","CWE-401","CWE-772 CWE-772 Missing Release of Resource after Effective Lifetime"],"metrics":{"cvssMetricV31":[{"source":"security-officer@isc.org","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","versionStartIncluding":"9.20.0","versionEndExcluding":"9.20.21","matchCriteriaId":"2C0EF5D0-68A6-4E00-985B-523D9B243E49"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","versionStartIncluding":"9.21.0","versionEndExcluding":"9.21.20","matchCriteriaId":"B1DD0950-5CBD-49B2-8007-5E96B3C4FB1B"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"3104","Ordinal":"1","Title":"Memory leak in code preparing DNSSEC proofs of non-existence","CVE":"CVE-2026-3104","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"3104","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Memory leak in code preparing DNSSEC proofs of non-existence"}]}}}