CVE-2026-47274

{
  "id": "CVE-2026-47274",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-27T20:16:40.013",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, multiple pam_usb helper tools resolved external binaries through the PATH environment variable rather than using absolute paths. An attacker who can influence the process environment during PAM authentication or tool execution could substitute malicious binaries. The affected tools are pamusb-check (src/tmux.c), pamusb-conf (tools/pamusb-conf), and pamusb-keyring-unlock-gnome (tools/pamusb-keyring-unlock-gnome). This vulnerability is fixed in 0.9.0."
    },
    {
      "lang": "es",
      "value": "pam_usb proporciona autenticación de hardware para Linux utilizando medios extraíbles ordinarios. Antes de 0.9.0, múltiples herramientas auxiliares de pam_usb resolvían binarios externos a través de la variable de entorno PATH en lugar de utilizar rutas absolutas. Un atacante que puede influir en el entorno del proceso durante la autenticación PAM o la ejecución de la herramienta podría sustituir binarios maliciosos. Las herramientas afectadas son pamusb-check (src/tmux.c), pamusb-conf (tools/pamusb-conf) y pamusb-keyring-unlock-gnome (tools/pamusb-keyring-unlock-gnome). Esta vulnerabilidad está corregida en 0.9.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "mcdope",
          "product": "pam_usb",
          "versions": [
            {
              "version": "< 0.9.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-30T01:47:06.236927Z",
          "id": "CVE-2026-47274",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-427"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/mcdope/pam_usb/commit/1ee8745920388df48d001a8e61ba629071557937",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/mcdope/pam_usb/commit/52a1fd6413b7ffcc1a5b58ce432be42e7bf0dbd0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/mcdope/pam_usb/commit/993e73d8bebb1d8e62677388de3402b6ec36b600",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/mcdope/pam_usb/security/advisories/GHSA-pp29-w28g-r9h9",
      "source": "[email protected]"
    }
  ]
}