Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path._CVE-2026-5778

{
    "lastseen": "",
    "description": "Integer underflow in wolfSSL packet sniffer <= 5.9.0 allows an attacker to cause a program crash in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing a large out-of-bounds read and crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.",
    "published": "2026-04-09T21:45:09.053Z",
    "modified": "2026-04-10T13:53:29.181Z",
    "type": "cve",
    "title": "Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path.",
    "source": "wolfSSL",
    "references": "https://github.com/wolfSSL/wolfssl/pull/10125",
    "id": "CVE-2026-5778",
    "bulletinFamily": "",
    "cwe": [
        "CWE-191"
    ],
    "cvelist": null,
    "sourceData": "wolfSSL wolfSSL 0",
    "sourceHref": "",
    "cvss": {
        "score": 2.1,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/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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            "attackComplexity": "",
            "privilegesRequired": "",
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            "integrityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "wolfSSL",
    "version": "0",
    "vendor": "wolfSSL",
    "ai_description": "",
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    "ai_score": 0
}