FKIE_CVE-2026-3548

Vulnerability from fkie_nvd - Published: 2026-03-19 18:16 - Updated: 2026-06-17 10:43
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source.
References
facts@wolfssl.comhttps://github.com/wolfSSL/wolfssl/pull/9628/Issue Tracking, Patch
facts@wolfssl.comhttps://github.com/wolfSSL/wolfssl/pull/9873/Exploit, Issue Tracking, Patch
Impacted products
Vendor Product Version
wolfssl wolfssl *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.wolfssl.com/download/",
          "defaultStatus": "unaffected",
          "modules": [
            "wolfSSL"
          ],
          "packageName": "wolfSSL",
          "platforms": [
            "MacOS",
            "Linux",
            "Windows"
          ],
          "product": "wolfSSL",
          "programFiles": [
            "wolfcrypt/src/asn.c"
          ],
          "programRoutines": [
            {
              "name": "ParseCRL()"
            },
            {
              "name": "ParseCRL_Extensions()"
            }
          ],
          "repo": "https://github.com/wolfSSL/wolfssl",
          "vendor": "wolfSSL",
          "versions": [
            {
              "lessThan": "5.9.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "facts@wolfssl.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DA3FA1CB-CEDC-4D49-9ECD-99BBF1602312",
              "versionEndExcluding": "5.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source."
    },
    {
      "lang": "es",
      "value": "Dos vulnerabilidades de desbordamiento de b\u00fafer exist\u00edan en el analizador CRL de wolfSSL al analizar n\u00fameros CRL: un desbordamiento de b\u00fafer basado en mont\u00edculo podr\u00eda ocurrir al almacenar incorrectamente el n\u00famero CRL como una cadena hexadecimal, y un desbordamiento basado en pila para n\u00fameros CRL de tama\u00f1o suficiente. Con CRLs apropiadamente elaborados, cualquiera de estas escrituras fuera de l\u00edmites podr\u00eda ser activada. Tenga en cuenta que esto solo afecta a las compilaciones que habilitan espec\u00edficamente el soporte CRL, y el usuario necesitar\u00eda cargar un CRL de una fuente no confiable."
    }
  ],
  "id": "CVE-2026-3548",
  "lastModified": "2026-06-17T10:43:46.083",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "UNREPORTED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "facts@wolfssl.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-3548",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-19T18:00:17.636946Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-19T18:16:22.953",
  "references": [
    {
      "source": "facts@wolfssl.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/wolfSSL/wolfssl/pull/9628/"
    },
    {
      "source": "facts@wolfssl.com",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/wolfSSL/wolfssl/pull/9873/"
    }
  ],
  "sourceIdentifier": "facts@wolfssl.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        },
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "facts@wolfssl.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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