Heap overflow in libnv_CVE-2026-35547

{
    "lastseen": "",
    "description": "When processing the header of an incoming message, libnv failed to properly validate the message size.\n\nThe lack of validation allows a malicious program to write outside the bounds of a heap allocation.  This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.",
    "published": "2026-04-30T08:08:13.461Z",
    "modified": "2026-04-30T13:12:25.493Z",
    "type": "cve",
    "title": "Heap overflow in libnv",
    "source": "freebsd",
    "references": "https://security.freebsd.org/advisories/FreeBSD-SA-26:17.libnv.asc",
    "id": "CVE-2026-35547",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122",
        "CWE-130"
    ],
    "cvelist": null,
    "sourceData": "FreeBSD FreeBSD 15.0-RELEASE\nFreeBSD FreeBSD 14.4-RELEASE\nFreeBSD FreeBSD 14.3-RELEASE\nFreeBSD FreeBSD 13.5-RELEASE",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "FreeBSD",
    "version": "15.0-RELEASE, 14.4-RELEASE, 14.3-RELEASE, 13.5-RELEASE",
    "vendor": "FreeBSD",
    "ai_description": "Heap overflow vulnerability in libnv due to improper message size validation, potentially allowing privilege escalation.",
    "ai_severity": "CRITICAL",
    "ai_vendor": "FreeBSD",
    "ai_product": "libnv",
    "ai_version": "15.0-RELEASE, 14.4-RELEASE, 14.3-RELEASE, 13.5-RELEASE",
    "ai_score": 9.1
}