FKIE_CVE-2026-22185

Vulnerability from fkie_nvd - Published: 2026-01-07 21:16 - Updated: 2026-06-17 10:19
Severity
4.6 (Medium) - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Summary
OpenLDAP Lightning Memory-Mapped Database (LMDB) versions up to and including 0.9.14, prior to commit 8e1fda8, contain a heap buffer underflow in the readline() function of mdb_load. When processing malformed input containing an embedded NUL byte, an unsigned offset calculation can underflow and cause an out-of-bounds read of one byte before the allocated heap buffer. This can cause mdb_load to crash, leading to a limited denial-of-service condition.
References
disclosure@vulncheck.comhttps://bugs.openldap.org/show_bug.cgi?id=10421
disclosure@vulncheck.comhttps://seclists.org/fulldisclosure/2026/Jan/5
disclosure@vulncheck.comhttps://seclists.org/fulldisclosure/2026/Jan/8
disclosure@vulncheck.comhttps://www.openldap.org/
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenLDAP",
          "vendor": "OpenLDAP Foundation",
          "versions": [
            {
              "lessThan": "0.9.34",
              "status": "affected",
              "version": "0.9.14",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenLDAP Lightning Memory-Mapped Database (LMDB) versions up to and including 0.9.14, prior to commit 8e1fda8, contain a heap buffer underflow in the readline() function of mdb_load. When processing malformed input containing an embedded NUL byte, an unsigned offset calculation can underflow and cause an out-of-bounds read of one byte before the allocated heap buffer. This can cause mdb_load to crash, leading to a limited denial-of-service condition."
    },
    {
      "lang": "es",
      "value": "Las versiones de OpenLDAP Lightning Memory-Mapped Database (LMDB) hasta la 0.9.14 inclusive, anteriores al commit 8e1fda8, contienen un desbordamiento negativo de b\u00fafer de pila en la funci\u00f3n readline() de mdb_load. Al procesar una entrada malformada que contiene un byte NUL incrustado, un c\u00e1lculo de desplazamiento sin signo puede sufrir un desbordamiento negativo y causar una lectura fuera de l\u00edmites de un byte antes del b\u00fafer de pila asignado. Esto puede causar que mdb_load falle, lo que lleva a una condici\u00f3n de denegaci\u00f3n de servicio limitada."
    }
  ],
  "id": "CVE-2026-22185",
  "lastModified": "2026-06-17T10:19:30.257",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "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": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-22185",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-07T21:25:36.753538Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-07T21:16:01.733",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://bugs.openldap.org/show_bug.cgi?id=10421"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://seclists.org/fulldisclosure/2026/Jan/5"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://seclists.org/fulldisclosure/2026/Jan/8"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.openldap.org/"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        },
        {
          "lang": "en",
          "value": "CWE-191"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}



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