NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink_CVE-2026-42442

{
    "lastseen": "",
    "description": "NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser unconditionally treats the root inode as a directory without checking its type, and when the symlink has an embedded target (small di_size), the directory data buffer is zero-length, causing a null-pointer dereference on the first read. This vulnerability is fixed in 6.0.1698.0.",
    "published": "2026-05-12T19:21:04.924Z",
    "modified": "2026-05-12T19:21:04.924Z",
    "type": "cve",
    "title": "NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink",
    "source": "GitHub_M",
    "references": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-8r4x-fx3w-ph77",
    "id": "CVE-2026-42442",
    "bulletinFamily": "",
    "cwe": [
        "CWE-476"
    ],
    "cvelist": null,
    "sourceData": "M2Team NanaZip >= 5.0.1250.0, < 6.0.1698.0",
    "sourceHref": "",
    "cvss": {
        "score": 3.3,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "NanaZip",
    "version": ">= 5.0.1250.0, < 6.0.1698.0",
    "vendor": "M2Team",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}