CVE-2026-42002 (GCVE-0-2026-42002)

Vulnerability from cvelistv5 – Published: 2026-05-21 09:27 – Updated: 2026-05-21 09:27
VLAI?
Title
Concurrency and locking defects in GSS-TSIG
Summary
Concurrency and locking defects in GSS-TSIG
Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • Signal Handler Race Condition
Assigner
OX
References
Impacted products
Vendor Product Version
PowerDNS Authoritative Affected: 4.9.0 , < 4.9.15 (semver)
Affected: 5.0.0 , < 5.0.5 (semver)
Create a notification for this product.
Date Public ?
2026-05-19 22:00
Credits
thanos_haruki
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected",
          "modules": [
            "GSS-TSIG"
          ],
          "packageName": "pdns",
          "product": "Authoritative",
          "programFiles": [
            "gss_context.cc"
          ],
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "versions": [
            {
              "lessThan": "4.9.15",
              "status": "affected",
              "version": "4.9.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.0.5",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "thanos_haruki"
        }
      ],
      "datePublic": "2026-05-19T22:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eConcurrency and locking defects in GSS-TSIG\u003c/p\u003e"
            }
          ],
          "value": "Concurrency and locking defects in GSS-TSIG"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Signal Handler Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-21T09:27:04.431Z",
        "orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
        "shortName": "OX"
      },
      "references": [
        {
          "url": "https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Concurrency and locking defects in GSS-TSIG",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
    "assignerShortName": "OX",
    "cveId": "CVE-2026-42002",
    "datePublished": "2026-05-21T09:27:04.431Z",
    "dateReserved": "2026-04-23T11:15:21.198Z",
    "dateUpdated": "2026-05-21T09:27:04.431Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-42002\",\"sourceIdentifier\":\"security@open-xchange.com\",\"published\":\"2026-05-21T10:16:25.800\",\"lastModified\":\"2026-05-21T10:16:25.800\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Concurrency and locking defects in GSS-TSIG\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@open-xchange.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}]},\"references\":[{\"url\":\"https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html\",\"source\":\"security@open-xchange.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"8ce71d90-2354-404b-a86e-bec2cc4e6981\", \"shortName\": \"OX\", \"dateUpdated\": \"2026-05-21T09:27:04.431Z\"}, \"title\": \"Concurrency and locking defects in GSS-TSIG\", \"datePublic\": \"2026-05-19T22:00:00.000Z\", \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"Signal Handler Race Condition\", \"type\": \"CWE\"}]}], \"affected\": [{\"vendor\": \"PowerDNS\", \"product\": \"Authoritative\", \"collectionURL\": \"https://repo.powerdns.com/\", \"packageName\": \"pdns\", \"repo\": \"https://github.com/PowerDNS/pdns\", \"modules\": [\"GSS-TSIG\"], \"programFiles\": [\"gss_context.cc\"], \"versions\": [{\"status\": \"affected\", \"version\": \"4.9.0\", \"lessThan\": \"4.9.15\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.0.0\", \"lessThan\": \"5.0.5\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Concurrency and locking defects in GSS-TSIG\", \"supportingMedia\": [{\"type\": \"text/html\", \"base64\": false, \"value\": \"\u003cp\u003eConcurrency and locking defects in GSS-TSIG\u003c/p\u003e\"}]}], \"references\": [{\"url\": \"https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html\"}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}], \"cvssV3_1\": {\"version\": \"3.1\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\", \"baseSeverity\": \"MEDIUM\", \"baseScore\": 5.9, \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\"}}], \"credits\": [{\"lang\": \"en\", \"value\": \"thanos_haruki\", \"type\": \"finder\"}], \"source\": {\"discovery\": \"UNKNOWN\"}, \"x_generator\": {\"engine\": \"Vulnogram 1.0.2\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-42002\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-21T11:58:57.204166Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-364\", \"description\": \"CWE-364 Signal Handler Race Condition\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-21T11:58:52.576Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-42002\", \"assignerOrgId\": \"8ce71d90-2354-404b-a86e-bec2cc4e6981\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"OX\", \"dateReserved\": \"2026-04-23T11:15:21.198Z\", \"datePublished\": \"2026-05-21T09:27:04.431Z\", \"dateUpdated\": \"2026-05-21T11:59:46.710Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



Detection rules are retrieved from Rulezet.