Vulnerability-Lookup

GHSA-8XCR-6F99-HM7W

Vulnerability from github – Published: 2026-03-25 09:31 – Updated: 2026-06-30 03:36

Details

Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error. This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3608"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-617"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T09:16:25Z",
    "severity": "HIGH"
  },
  "details": "Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.\nThis issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.",
  "id": "GHSA-8xcr-6f99-hm7w",
  "modified": "2026-06-30T03:36:00Z",
  "published": "2026-03-25T09:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3608"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11344"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:7342"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-3608"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451139"
    },
    {
      "type": "WEB",
      "url": "https://downloads.isc.org/isc/kea/2.6.5"
    },
    {
      "type": "WEB",
      "url": "https://downloads.isc.org/isc/kea/3.0.3"
    },
    {
      "type": "WEB",
      "url": "https://kb.isc.org/docs/cve-2026-3608"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3608.json"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/03/25/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-3608 (GCVE-0-2026-3608)

Vulnerability from cvelistv5 – Published: 2026-03-25 08:46 – Updated: 2026-07-15 01:02

Title

Stack overflow in Kea daemons

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-25 13:26 UTC

CWE

CWE-617 - Reachable Assertion

Assigner

isc mitre root

References

9 references

URL	Tags
https://kb.isc.org/docs/cve-2026-3608	vendor-advisory
https://downloads.isc.org/isc/kea/2.6.5	patch
https://downloads.isc.org/isc/kea/3.0.3	patch
http://www.openwall.com/lists/oss-security/2026/03/25/6
https://access.redhat.com/security/cve/CVE-2026-3608	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2451139	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:11344	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7342	vendor-advisoryx_refsource_REDHAT

Impacted products

3 products

Vendor	Product	Version
ISC	Kea	Affected: 2.6.0 , ≤ 2.6.4 (custom) Affected: 3.0.0 , ≤ 3.0.2 (custom) cpe:2.3:a:isc:kea:::::::: cpe:2.3:a:isc:kea::::::::
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:3.0.1-3.el10_1 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.1
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	Unaffected: 0:2.6.3-2.el10_0.3 , < * (rpm) cpe:/o:redhat:enterprise_linux_eus:10.0

Date Public

2026-03-25 00:00

Credits

ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3608",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-25T13:26:04.073699Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-25T13:26:12.153Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-03-25T17:22:19.777Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/03/25/6"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.1"
            ],
            "defaultStatus": "affected",
            "packageName": "kea",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:3.0.1-3.el10_1",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "packageName": "kea",
            "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:2.6.3-2.el10_0.3",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "datePublic": "2026-03-25T08:46:48.992Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in Kea. A remote attacker can send a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener. This can cause a stack overflow error, leading to the daemon exiting and resulting in a Denial of Service (DoS)."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "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"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-617",
                "description": "Reachable Assertion",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T01:02:33.862Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-3608"
          },
          {
            "name": "RHBZ#2451139",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451139"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3608.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:11344"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:7342"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:11344: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:7342: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-03-25T09:01:15.192Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-03-25T08:46:48.992Z",
            "value": "Made public."
          }
        ],
        "title": "Kea: Kea: Denial of Service via maliciously crafted message",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kea",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "2.6.4",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "3.0.2",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "2.6.4",
                  "versionStartIncluding": "2.6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "3.0.2",
                  "versionStartIncluding": "3.0.0",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2026-03-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.\nThis issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Loss of DHCP services"
            }
          ]
        }
      ],
      "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-617",
              "description": "CWE-617 Reachable Assertion",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T08:46:48.992Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2026-3608",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2026-3608"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/kea/2.6.5"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/kea/3.0.3"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of Kea: 2.6.5 or 3.0.3."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Stack overflow in Kea daemons",
      "workarounds": [
        {
          "lang": "en",
          "value": "Securing the API sockets with TLS, and requiring the client to authenticate with a certificate (mutual authentication), prevents the attacker from establishing an API connection to Kea.  Set cert-required to true (the default) to require a client certificate.  See: https://kea.readthedocs.io/en/stable/arm/security.html#tls-https-configuration"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2026-3608",
    "datePublished": "2026-03-25T08:46:48.992Z",
    "dateReserved": "2026-03-05T17:47:36.088Z",
    "dateUpdated": "2026-07-15T01:02:33.862Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.