CVE-2026-102484

Full vulnerability record from the local CVENow database.

Description

Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies.

Severity

MEDIUM

CVSS score

6.4 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-10-21 16:17:14.043000

Last modified

2026-10-29 21:17:07.933000

View original CVE JSON

{
  "id": "CVE-2026-102484",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-21T16:17:14.043",
  "lastModified": "2026-10-29T21:17:07.933",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "NTPsec",
          "product": "ntpsec",
          "defaultStatus": "unknown",
          "repo": "https://gitlab.com/NTPsec/ntpsec",
          "versions": [
            {
              "version": "0",
              "lessThan": "1.2.6",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "PHYSICAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 5.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-29T17:32:37.629664Z",
          "id": "CVE-2026-102484",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://gitlab.com/NTPsec/ntpsec/-/commit/62a454f6fcb6f2dcc8d5866f6558905ebdb7dd69",
      "source": "[email protected]"
    },
    {
      "url": "https://gitlab.com/NTPsec/ntpsec/-/work_items/895",
      "source": "[email protected]"
    }
  ]
}