{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.9.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e2f30b22cd0715fcde0fc62d6ee3e1ca6370b8a9"
            }
          ],
          "repo": "https://github.com/mcdope/pam_usb",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-w38v-cw9r-x9p6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48064.json"
  },
  "details": "pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, when a PAM service is configured with deny_remote=false in pam_usb (commonly done for display managers such as gdm-password or lightdm to bypass process/TTY heuristics for local sessions), the PAM_RHOST check in pusb_do_auth() is also skipped. PAM_RHOST is set by remote daemons (sshd, XDMCP servers) to identify the remote client address. Because the check is gated inside if (opts.deny_remote), a genuine remote XDMCP connection reaches the USB device authentication step instead of being rejected. This vulnerability is fixed in 0.9.1.",
  "id": "CVE-2026-48064",
  "modified": "2026-07-15T01:49:02.547275351Z",
  "published": "2026-05-27T19:59:53.496Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48064.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/mcdope/pam_usb/security/advisories/GHSA-w38v-cw9r-x9p6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48064"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mcdope/pam_usb/issues/348"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pam_usb: PAM_RHOST check skipped when deny_remote=false allows XDMCP authentication bypass"
}