uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation_CVE-2026-35347

{
    "lastseen": "",
    "description": "The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.",
    "published": "2026-04-22T16:07:54.366Z",
    "modified": "2026-04-22T16:07:54.366Z",
    "type": "cve",
    "title": "uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation",
    "source": "canonical",
    "references": "https://github.com/uutils/coreutils/pull/9545\nhttps://github.com/uutils/coreutils/releases/tag/0.6.0",
    "id": "CVE-2026-35347",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20"
    ],
    "cvelist": null,
    "sourceData": "Uutils coreutils 0",
    "sourceHref": "",
    "cvss": {
        "score": 4.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
        "version": "3.1"
    },
    "cvss2": [],
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "coreutils",
    "version": "0",
    "vendor": "Uutils",
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    "ai_score": 0
}