OpenLDAP <= 2.6.10 LMDB mdb_load Heap Buffer Underflow in readline()_CVE-2026-22185

{
    "lastseen": "",
    "description": "OpenLDAP Lightning Memory-Mapped Database (LMDB) mdb_load contains a heap buffer underflow vulnerability in the readline() function. When processing malformed input, an unsigned offset calculation can underflow a heap pointer, resulting in an out-of-bounds read of one byte before the allocated heap buffer. This may allow a local attacker to cause a denial of service and potentially disclose limited heap memory contents.",
    "published": "2026-01-07T20:26:30.054Z",
    "modified": "2026-01-07T21:25:58.538Z",
    "type": "cve",
    "title": "OpenLDAP <= 2.6.10 LMDB mdb_load Heap Buffer Underflow in readline()",
    "source": "VulnCheck",
    "references": "https://seclists.org/fulldisclosure/2026/Jan/5\nhttps://seclists.org/fulldisclosure/2026/Jan/8\nhttps://www.openldap.org/\nhttps://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline",
    "id": "CVE-2026-22185",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125",
        "CWE-191"
    ],
    "cvelist": null,
    "sourceData": "OpenLDAP Foundation OpenLDAP 0",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OpenLDAP",
    "version": "0",
    "vendor": "OpenLDAP Foundation",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}