CVE-2026-44709

{
  "id": "CVE-2026-44709",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-27T21:16:17.807",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, pamusb-pinentry reads the PINENTRY_FALLBACK_APP environment variable and executes it directly without any validation. Any process that can set environment variables before pamusb-pinentry is invoked can point PINENTRY_FALLBACK_APP at an arbitrary binary or script and have it executed with the privileges of the pam_usb tool chain. This vulnerability is fixed in 0.8.7."
    },
    {
      "lang": "es",
      "value": "pam_usb proporciona autenticación de hardware para Linux utilizando medios extraíbles ordinarios. Antes de 0.8.7, pamusb-pinentry lee la variable de entorno PINENTRY_FALLBACK_APP y la ejecuta directamente sin ninguna validación. Cualquier proceso que pueda establecer variables de entorno antes de que se invoque pamusb-pinentry puede apuntar PINENTRY_FALLBACK_APP a un binario o script arbitrario y hacer que se ejecute con los privilegios de la cadena de herramientas de pam_usb. Esta vulnerabilidad está corregida en 0.8.7."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "mcdope",
          "product": "pam_usb",
          "versions": [
            {
              "version": "< 0.8.7",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-02T17:58:32.295600Z",
          "id": "CVE-2026-44709",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/mcdope/pam_usb/security/advisories/GHSA-jxrj-q67x-wr4c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/mcdope/pam_usb/security/advisories/GHSA-jxrj-q67x-wr4c",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}