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CVE-1999-0451

Status: ModifiedLow (2.1)—Exploit
Severity2.1Low · CVSS 2.0
Exploitation probability0.73 %higher than 54% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailablePublished on Exploit-DB

Denial of service in Linux 2.0.36 allows local users to prevent any server from listening on any non-privileged port.

CVSS

Base score
2.1
Version
2.0
Vector
AV:L/AC:L/Au:N/C:N/I:N/A:P

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.73 %
Percentile among all scored CVEs
54
Score date
10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (1)

Linux — Linux Kernel

CWEs

References

Show 2 references

Raw JSON (NVD)

Show
{
  "id": "CVE-1999-0451",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "1999-01-19T05:00:00.000",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/343",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/343",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Denial of service in Linux 2.0.36 allows local users to prevent any server from listening on any non-privileged port."
    }
  ],
  "lastModified": "2026-06-16T21:48:25.460",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "96A6EE7E-C79C-4B25-AFF0-C6638CB3C99A"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.2.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "146F7A77-A950-4CAD-BDA9-C239696F569D"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}