uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race_CVE-2026-35355

{
    "lastseen": "",
    "description": "The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.",
    "published": "2026-04-22T16:08:14.960Z",
    "modified": "2026-04-22T16:08:14.960Z",
    "type": "cve",
    "title": "uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race",
    "source": "canonical",
    "references": "https://github.com/uutils/coreutils/pull/10067\nhttps://github.com/uutils/coreutils/releases/tag/0.6.0",
    "id": "CVE-2026-35355",
    "bulletinFamily": "",
    "cwe": [
        "CWE-367"
    ],
    "cvelist": null,
    "sourceData": "Uutils coreutils 0",
    "sourceHref": "",
    "cvss": {
        "score": 6.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
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    "product": "coreutils",
    "version": "0",
    "vendor": "Uutils",
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}