CVE-2021-39230

Status: ModifiedMedium (6.5)—

Butter is a system usability utility. Due to a kernel error the JPNS kernel is being discontinued. Affected users are recommend to update to the Trinity kernel. There are no workarounds.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base score: 6.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.76%
Percentile among all scored CVEs: 54
Score date: 10/12/2026

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).

Affected technologies (1)

Butter Project — Butter

CWEs

CWE-20
NVD-CWE-noinfo

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2021-39230",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/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": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
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          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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        "impactScore": 3.6,
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  "affected": [
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          "vendor": "FrankEnderman",
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          "versions": [
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              "version": "< 1.5"
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        }
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  ],
  "published": "2021-09-21T17:15:09.860",
  "references": [
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      "url": "https://github.com/FrankEnderman/Butter/commit/a4fd717e848306f04f2823ea5f617e4da9f5bbdb",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/FrankEnderman/Butter/security/advisories/GHSA-4538-4g86-xf6j",
      "tags": [
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    {
      "url": "https://github.com/FrankEnderman/Butter/commit/a4fd717e848306f04f2823ea5f617e4da9f5bbdb",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/FrankEnderman/Butter/security/advisories/GHSA-4538-4g86-xf6j",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Butter is a system usability utility. Due to a kernel error the JPNS kernel is being discontinued. Affected users are recommend to update to the Trinity kernel. There are no workarounds."
    },
    {
      "lang": "es",
      "value": "Butter es una utilidad de uso del sistema. Debido a un error del kernel, el kernel JPNS está siendo descontinuado. Se recomienda a usuarios afectados que actualicen al kernel Trinity. No se presentan soluciones"
    }
  ],
  "lastModified": "2026-06-17T04:03:21.707",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "matchCriteriaId": "33FB3AFA-95E8-4D90-8506-FF9782B8AF1E",
              "versionEndExcluding": "1.5"
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          "operator": "OR"
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  "sourceIdentifier": "security-advisories@github.com"
}