389-ds-base: 389-ds-base: heap buffer overflow in schema objectclass serialization due to missing oc_superior in size calculation_CVE-2026-11884

{
    "lastseen": "",
    "description": "A heap buffer overflow flaw was found in 389 Directory Server. When serializing objectclass definitions, the oc_superior (SUP) field length is omitted from buffer size calculations in read_schema_dse() and schema_oc_to_string(), but the field is still written via strcat(). An attacker with Directory Manager privileges, or a compromised replication supplier, can trigger a server crash by creating objectclasses with long SUP values. This is an incomplete fix variant of CVE-2025-14905.",
    "published": "2026-06-10T14:07:13.559Z",
    "modified": "2026-06-10T14:07:13.559Z",
    "type": "cve",
    "title": "389-ds-base: 389-ds-base: heap buffer overflow in schema objectclass serialization due to missing oc_superior in size calculation",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-11884\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2423624\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2484913\nhttps://redhat.atlassian.net/browse/PSIRTSUPT-7600",
    "id": "CVE-2026-11884",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Red Hat Directory Server 11",
    "version": "",
    "vendor": "Red Hat",
    "ai_description": "",
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    "ai_vendor": "",
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    "ai_score": 0
}