CVE-2026-33259 (GCVE-0-2026-33259)
Vulnerability from cvelistv5 – Published: 2026-04-22 09:38 – Updated: 2026-04-22 18:10
VLAI?
Title
Concurrent modification of RPZ data can lead to denial of servce
Summary
Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.
Severity ?
5 (Medium)
CWE
- Use After Free
Assigner
References
Impacted products
Date Public ?
2026-04-21 22:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-33259",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-22T17:52:55.860673Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-22T18:10:14.046Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.powerdns.com/",
"defaultStatus": "unaffected",
"modules": [
"RPZ"
],
"packageName": "pdns-recursor",
"product": "Recursor",
"programFiles": [
"filterpo.hh"
],
"repo": "https://github.com/PowerDNS/pdns",
"vendor": "PowerDNS",
"versions": [
{
"lessThan": "5.4.1",
"status": "affected",
"version": "5.4.0",
"versionType": "semver"
},
{
"lessThan": "5.3.6",
"status": "affected",
"version": "5.3.0",
"versionType": "semver"
},
{
"lessThan": "5.2.9",
"status": "affected",
"version": "5.2.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Haruto Kimura (Stella)"
}
],
"datePublic": "2026-04-21T22:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eHaving many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.\u003c/p\u003e"
}
],
"value": "Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-22T09:38:51.991Z",
"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
"shortName": "OX"
},
"references": [
{
"url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Concurrent modification of RPZ data can lead to denial of servce",
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
"assignerShortName": "OX",
"cveId": "CVE-2026-33259",
"datePublished": "2026-04-22T09:38:51.991Z",
"dateReserved": "2026-03-18T10:06:16.573Z",
"dateUpdated": "2026-04-22T18:10:14.046Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-33259",
"date": "2026-04-23",
"epss": "2e-05",
"percentile": "0.00037"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-33259\",\"sourceIdentifier\":\"security@open-xchange.com\",\"published\":\"2026-04-22T10:16:51.580\",\"lastModified\":\"2026-04-22T21:23:52.620\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@open-xchange.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H\",\"baseScore\":5.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":0.7,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"references\":[{\"url\":\"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html\",\"source\":\"security@open-xchange.com\"}]}}",
"vulnrichment": {
"containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"8ce71d90-2354-404b-a86e-bec2cc4e6981\", \"shortName\": \"OX\", \"dateUpdated\": \"2026-04-22T09:38:51.991Z\"}, \"title\": \"Concurrent modification of RPZ data can lead to denial of servce\", \"datePublic\": \"2026-04-21T22:00:00.000Z\", \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"Use After Free\", \"type\": \"CWE\"}]}], \"affected\": [{\"vendor\": \"PowerDNS\", \"product\": \"Recursor\", \"collectionURL\": \"https://repo.powerdns.com/\", \"packageName\": \"pdns-recursor\", \"repo\": \"https://github.com/PowerDNS/pdns\", \"modules\": [\"RPZ\"], \"programFiles\": [\"filterpo.hh\"], \"versions\": [{\"status\": \"affected\", \"version\": \"5.4.0\", \"lessThan\": \"5.4.1\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.3.0\", \"lessThan\": \"5.3.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.2.0\", \"lessThan\": \"5.2.9\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.\", \"supportingMedia\": [{\"type\": \"text/html\", \"base64\": false, \"value\": \"\u003cp\u003eHaving many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.\u003c/p\u003e\"}]}], \"references\": [{\"url\": \"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html\"}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}], \"cvssV3_1\": {\"version\": \"3.1\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"baseSeverity\": \"MEDIUM\", \"baseScore\": 5, \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H\"}}], \"credits\": [{\"lang\": \"en\", \"value\": \"Haruto Kimura (Stella)\", \"type\": \"finder\"}], \"source\": {\"discovery\": \"UNKNOWN\"}, \"x_generator\": {\"engine\": \"Vulnogram 1.0.1\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-33259\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-22T17:52:55.860673Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-22T18:04:15.479Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-33259\", \"assignerOrgId\": \"8ce71d90-2354-404b-a86e-bec2cc4e6981\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"OX\", \"dateReserved\": \"2026-03-18T10:06:16.573Z\", \"datePublished\": \"2026-04-22T09:38:51.991Z\", \"dateUpdated\": \"2026-04-22T18:10:14.046Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…