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vuln-cve/data/2026/12xxx/CVE-2026-12617.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-12617",
"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"state": "PUBLISHED",
"assignerShortName": "isc",
"dateReserved": "2026-06-18T13:52:43.335Z",
"datePublished": "2026-07-22T14:14:46.397Z",
"dateUpdated": "2026-07-22T18:48:15.278Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"shortName": "isc",
"dateUpdated": "2026-07-22T14:14:46.397Z"
},
"title": "Record ordering based unexpected exit with CNAME or DNAME",
"datePublic": "2026-07-22T00:00:00.000Z",
"affected": [
{
"vendor": "ISC",
"product": "BIND 9",
"versions": [
{
"version": "9.18.0",
"lessThanOrEqual": "9.18.50",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.20.0",
"lessThanOrEqual": "9.20.24",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.18.11-S1",
"lessThanOrEqual": "9.18.50-S1",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.20.9-S1",
"lessThanOrEqual": "9.20.24-S1",
"status": "affected",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"versionStartIncluding": "9.18.0",
"versionEndIncluding": "9.18.50"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"versionStartIncluding": "9.20.0",
"versionEndIncluding": "9.20.24"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"versionStartIncluding": "9.18.11-S1",
"versionEndIncluding": "9.18.50-S1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
"versionStartIncluding": "9.20.9-S1",
"versionEndIncluding": "9.20.24-S1"
}
]
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH",
"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"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"type": "CWE",
"cweId": "CWE-617",
"description": "CWE-617 Reachable Assertion"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, `named` may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "If one of these situations is encountered, BIND may exit with an assertion."
}
]
}
],
"workarounds": [
{
"lang": "en",
"value": "No workarounds known."
}
],
"exploits": [
{
"lang": "en",
"value": "We are not aware of any active exploits."
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.26 or 9.20.26-S1."
}
],
"credits": [
{
"lang": "en",
"value": "ISC would like to thank Qifan Zhang of Palo Alto Networks for bringing this vulnerability to our attention."
}
],
"references": [
{
"url": "https://kb.isc.org/docs/cve-2026-12617",
"name": "CVE-2026-12617",
"tags": [
"vendor-advisory"
]
},
{
"url": "https://downloads.isc.org/isc/bind9/9.20.26",
"tags": [
"patch"
]
}
],
"source": {
"discovery": "EXTERNAL"
},
"x_generator": {
"engine": "cvelib 1.8.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-22T18:48:06.430818Z",
"id": "CVE-2026-12617",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-22T18:48:15.278Z"
}
}
]
}
}