ML-KEM-1024 x64 AVX2 implicit rejection failure breaks IND-CCA2 security_CVE-2026-10097

{
    "lastseen": "",
    "description": "ML-KEM-1024 x64 AVX2 implicit rejection failure in the Fujisaki-Okamoto transform breaks IND-CCA2 security, allowing decapsulation to deviate from the implicit-rejection behavior required by the standard. The AVX2 constant-time ciphertext comparison used during decapsulation never compared the final 32-byte block of the 1568-byte ML-KEM-1024 ciphertext, so a ciphertext manipulated only in those final bytes would compare as equal and decapsulation returned the real shared secret instead of performing the required implicit rejection.",
    "published": "2026-06-25T19:59:30.848Z",
    "modified": "2026-06-25T19:59:30.848Z",
    "type": "cve",
    "title": "ML-KEM-1024 x64 AVX2 implicit rejection failure breaks IND-CCA2 security",
    "source": "wolfSSL",
    "references": "https://github.com/wolfSSL/wolfssl/pull/10430\nhttps://www.wolfssl.com/docs/security-vulnerabilities/",
    "id": "CVE-2026-10097",
    "bulletinFamily": "",
    "cwe": [
        "CWE-327"
    ],
    "cvelist": null,
    "sourceData": "wolfSSL wolfSSL 5.7.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.3,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/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": "",
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            "privilegesRequired": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "wolfSSL",
    "version": "5.7.0",
    "vendor": "wolfSSL",
    "ai_description": "",
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    "ai_score": 0
}