Capstone doesn’t check vsnprintf return in SStream_concat, allows stack buffer underflow and overflow_CVE-2025-68114

{
    "lastseen": "",
    "description": "Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, an unchecked vsnprintf return in SStream_concat lets a malicious cs_opt_mem.vsnprintf drive SStream\u2019s index negative or past the end, leading to a stack buffer underflow/overflow when the next write occurs. Commit 2c7797182a1618be12017d7d41e0b6581d5d529e fixes the issue.",
    "published": "2025-12-17T21:14:31.226Z",
    "modified": "2025-12-17T21:14:31.226Z",
    "type": "cve",
    "title": "Capstone doesn't check vsnprintf return in SStream_concat, allows stack buffer underflow and overflow",
    "source": "GitHub_M",
    "references": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-85f5-6xr3-q76r\nhttps://github.com/capstone-engine/capstone/commit/2c7797182a1618be12017d7d41e0b6581d5d529e",
    "id": "CVE-2025-68114",
    "bulletinFamily": "",
    "cwe": [
        "CWE-124",
        "CWE-120"
    ],
    "cvelist": null,
    "sourceData": "capstone-engine capstone <= 6.0.0-Alpha5",
    "sourceHref": "",
    "cvss": {
        "score": 4.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
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            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "capstone",
    "version": "<= 6.0.0-Alpha5",
    "vendor": "capstone-engine",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
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    "ai_score": 0
}