FKIE_CVE-2026-35352

Vulnerability from fkie_nvd - Published: 2026-04-22 17:16 - Updated: 2026-04-24 19:03
Summary
A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.
References
Impacted products
Vendor Product Version
uutils coreutils -

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      "nodes": [
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          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:uutils:coreutils:-:*:*:*:*:rust:*:*",
              "matchCriteriaId": "4A9AF9E4-E17C-48AD-8051-B49998618839",
              "vulnerable": true
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges."
    }
  ],
  "id": "CVE-2026-35352",
  "lastModified": "2026-04-24T19:03:53.083",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "security@ubuntu.com",
        "type": "Secondary"
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  "published": "2026-04-22T17:16:37.597",
  "references": [
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      "source": "security@ubuntu.com",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
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      "url": "https://github.com/uutils/coreutils/issues/10020"
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      "tags": [
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        "Issue Tracking",
        "Vendor Advisory"
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      "url": "https://github.com/uutils/coreutils/issues/10020"
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  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
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      "source": "security@ubuntu.com",
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}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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