CVE catalog

CVE-2026-102484

ntpsec affected and fixed versions

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 6.4CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Published: Oct 21, 2026, 4:17:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.21% · Oct 27, 2026

Projects and upstream resources

[ntpsec][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "ntpsec",
      "status": "vulnerable",
      "release": "sid",
      "version": "1.2.5+dfsg-1"
    },
    {
      "name": "ntpsec",
      "status": "vulnerable",
      "release": "forky",
      "version": "1.2.5+dfsg-1"
    },
    {
      "name": "ntpsec",
      "status": "vulnerable",
      "release": "trixie",
      "version": "1.2.3+dfsg1-8"
    },
    {
      "name": "ntpsec",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1.2.2+dfsg1-1+deb12u1"
    },
    {
      "name": "ntpsec",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "1.2.2+dfsg1-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1151689,
      "name": "ntpsec",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1151689,
      "name": "ntpsec",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1151689,
      "name": "ntpsec",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1151689,
      "name": "ntpsec",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "ntpsec",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "1.0.0+dfsg1-1",
        "1.0.0+dfsg1-3",
        "1.1.0+dfsg1-1",
        "1.1.0+dfsg1-1ubuntu0.1",
        "1.1.0+dfsg1-1ubuntu0.2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-102484"
    },
    {
      "name": "ntpsec",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1.1.3+dfsg1-2",
        "1.1.7+dfsg1-1",
        "1.1.7+dfsg1-2",
        "1.1.8+dfsg1-1",
        "1.1.8+dfsg1-3",
        "1.1.8+dfsg1-4",
        "1.1.8+dfsg1-4build1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-102484"
    },
    {
      "name": "ntpsec",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "1.2.0+dfsg1-4",
        "1.2.1+dfsg1-2",
        "1.2.1+dfsg1-3",
        "1.2.1+dfsg1-3ubuntu1",
        "1.2.1+dfsg1-4"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-102484"
    },
    {
      "name": "ntpsec",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "1.2.2+dfsg1-2",
        "1.2.2+dfsg1-3",
        "1.2.2+dfsg1-4",
        "1.2.2+dfsg1-4build1",
        "1.2.2+dfsg1-4build2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-102484"
    },
    {
      "name": "ntpsec",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "1.2.3+dfsg1-8ubuntu2",
        "1.2.3+dfsg1-8ubuntu3"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-102484"
    },
    {
      "name": "ntpsec",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "1.2.3+dfsg1-8ubuntu1",
        "1.2.3+dfsg1-8ubuntu2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-102484"
    }
  ]
}

[Debian bug #1151689]

Publisher notes

[trixie] ntpsec: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[ntp]Unknown
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntpdate]Unknown
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntp-doc]Unknown
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntpsec]Unknown
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntpsec-doc]Unknown
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntpsec-ntpdate]Unknown
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntpsec-ntpdig]Unknown
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[ntpsec-ntpviz]Unknown
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[python3-ntp]Unknown
Source package: [ntpsec]
Details (4)
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · amd64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1.2.2+dfsg1-1+deb12u1 · arm64 · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
[sntp]Unknown
Source package: [ntpsec]
Details (4)
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12
- 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-1+deb12u1 · all · bookworm-security
  Affected
  dsa · ntpsec · debian · bookworm; dsa · ntpsec · debian · 12

[Debian 13 (Trixie)]

[ntpsec]Unknown
Details (2)
- 1.2.3+dfsg1-8 · amd64 · trixie
  Affected
  dsa · ntpsec · debian · 13
- 1.2.3+dfsg1-8 · arm64 · trixie
  Affected
  dsa · ntpsec · debian · 13
[ntpsec-doc]Unknown
Source package: [ntpsec]
Details (2)
- 1.2.3+dfsg1-8 · all · trixie
  Affected
  dsa · ntpsec · debian · 13
- 1.2.3+dfsg1-8 · all · trixie
  Affected
  dsa · ntpsec · debian · 13
[ntpsec-ntpdate]Unknown
Source package: [ntpsec]
Details (2)
- 1.2.3+dfsg1-8 · amd64 · trixie
  Affected
  dsa · ntpsec · debian · 13
- 1.2.3+dfsg1-8 · arm64 · trixie
  Affected
  dsa · ntpsec · debian · 13
[ntpsec-ntpdig]Unknown
Source package: [ntpsec]
Details (2)
- 1.2.3+dfsg1-8 · amd64 · trixie
  Affected
  dsa · ntpsec · debian · 13
- 1.2.3+dfsg1-8 · arm64 · trixie
  Affected
  dsa · ntpsec · debian · 13
[ntpsec-ntpviz]Unknown
Source package: [ntpsec]
Details (2)
- 1.2.3+dfsg1-8 · amd64 · trixie
  Affected
  dsa · ntpsec · debian · 13
- 1.2.3+dfsg1-8 · arm64 · trixie
  Affected
  dsa · ntpsec · debian · 13
[python3-ntp]Unknown
Source package: [ntpsec]
Details (2)
- 1.2.3+dfsg1-8 · amd64 · trixie
  Affected
  dsa · ntpsec · debian · 13
- 1.2.3+dfsg1-8 · arm64 · trixie
  Affected
  dsa · ntpsec · debian · 13

Observed: Oct 25, 2026, 2:52:12 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]