smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow_CVE-2026-44983

{
    "lastseen": "",
    "description": "smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.",
    "published": "2026-05-26T21:38:13.753Z",
    "modified": "2026-05-26T21:38:13.753Z",
    "type": "cve",
    "title": "smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow",
    "source": "GitHub_M",
    "references": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr",
    "id": "CVE-2026-44983",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122",
        "CWE-190"
    ],
    "cvelist": null,
    "sourceData": "servo smallbitvec >= 1.0.1, < 2.6.1",
    "sourceHref": "",
    "cvss": {
        "score": 7.3,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "smallbitvec",
    "version": ">= 1.0.1, < 2.6.1",
    "vendor": "servo",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}