Heap buffer overflow in array_merge()_CVE-2025-14178

{
    "lastseen": "",
    "description": "In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE, due to an integer overflow in the precomputation of element counts using zend_hash_num_elements(). This may lead to memory corruption or crashes and affect the integrity and availability of the target server.",
    "published": "2025-12-27T19:27:41.691Z",
    "modified": "2025-12-27T19:27:41.691Z",
    "type": "cve",
    "title": "Heap buffer overflow in array_merge()",
    "source": "php",
    "references": "https://github.com/php/php-src/security/advisories/GHSA-h96m-rvf9-jgm2",
    "id": "CVE-2025-14178",
    "bulletinFamily": "",
    "cwe": [
        "CWE-787",
        "CWE-190"
    ],
    "cvelist": null,
    "sourceData": "PHP Group PHP 8.1.*\nPHP Group PHP 8.2.*\nPHP Group PHP 8.3.*\nPHP Group PHP 8.4.*\nPHP Group PHP 8.5.*",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/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": "PHP",
    "version": "8.1.*",
    "vendor": "PHP Group",
    "ai_description": "",
    "ai_severity": "",
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    "ai_product": "",
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    "ai_score": 0
}