CVE-2026-35372

{
  "id": "CVE-2026-35372",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-22T17:16:41.850",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A logic error in the ln utility of uutils coreutils allows the utility to dereference a symbolic link target even when the --no-dereference (or -n) flag is explicitly provided. The implementation previously only honored the \"no-dereference\" intent if the --force (overwrite) mode was also enabled. This flaw causes ln to follow a symbolic link that points to a directory and create new links inside that target directory instead of treating the symbolic link itself as the destination. In environments where a privileged user or system script uses ln -n to update a symlink, a local attacker could manipulate existing symbolic links to redirect file creation into sensitive directories, potentially leading to unauthorized file creation or system misconfiguration."
    },
    {
      "lang": "es",
      "value": "Un error de lógica en la utilidad ln de uutils coreutils permite a la utilidad desreferenciar un objetivo de enlace simbólico incluso cuando la bandera --no-dereference (o -n) se proporciona explícitamente. La implementación anteriormente solo respetaba la intención de ’no desreferenciar’ si el modo --force (sobrescribir) también estaba habilitado. Esta falla hace que ln siga un enlace simbólico que apunta a un directorio y cree nuevos enlaces dentro de ese directorio objetivo en lugar de tratar el propio enlace simbólico como el destino. En entornos donde un usuario privilegiado o un script del sistema utiliza ln -n para actualizar un enlace simbólico, un atacante local podría manipular enlaces simbólicos existentes para redirigir la creación de archivos hacia directorios sensibles, lo que podría llevar a la creación de archivos no autorizados o a una mala configuración del sistema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Uutils",
          "product": "coreutils",
          "defaultStatus": "unaffected",
          "collectionURL": "https://github.com/uutils",
          "packageName": "coreutils",
          "platforms": [
            "Linux",
            "Unix",
            "macOS"
          ],
          "repo": "https://github.com/uutils/coreutils",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.8.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N",
          "baseScore": 5.0,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-22T17:21:07.778700Z",
          "id": "CVE-2026-35372",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-61"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*",
              "versionEndExcluding": "0.8.0",
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  "references": [
    {
      "url": "https://github.com/uutils/coreutils/pull/11253",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/uutils/coreutils/releases/tag/0.8.0",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    }
  ]
}