{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-40779",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-28T14:07:45.683079Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-28T14:08:05.935Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kea",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "2.7.9",
              "status": "affected",
              "version": "2.7.1",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "3.0.0"
            },
            {
              "status": "affected",
              "version": "3.1.0"
            },
            {
              "lessThanOrEqual": "2.6.4",
              "status": "unaffected",
              "version": "2.6.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank the following for bringing this vulnerability to our attention:\n\n* Jochen M.\n* Martin Dinev, Trading212\n* Ashwani Kumar, Post Graduate Institute of Medical Education \u0026 Research, Chandigarh, India\n* Bret Giddings, University of Essex\n* Florian Ritterhoff, Munich University of Applied Sciences"
        }
      ],
      "datePublic": "2025-08-27T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the `kea-dhcp4` process will abort with an assertion failure.  This happens only if the client request is unicast directly to Kea; broadcast messages do not cause the problem.\nThis issue affects Kea versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Denial of service.  A malicious or misconfigured DHCP client can crash the Kea DHCPv4 service by sending a single packet."
            }
          ]
        }
      ],
      "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-476",
              "description": "CWE-476 NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-27T20:23:29.489Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2025-40779",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2025-40779"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of Kea: 3.0.1 or 3.1.1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Kea crash upon interaction between specific client options and subnet selection",
      "workarounds": [
        {
          "lang": "en",
          "value": "No workarounds known."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2025-40779",
    "datePublished": "2025-08-27T20:23:29.489Z",
    "dateReserved": "2025-04-16T08:44:49.857Z",
    "dateUpdated": "2025-08-28T14:08:05.935Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}