{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.9.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d4083e266b7e18e41e58b3392b5856941a3b5b1c"
            }
          ],
          "repo": "https://github.com/mcdope/pam_usb",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4j8q-67fq-3xc3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-367"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48983.json"
  },
  "details": "pam_usb provides hardware authentication for Linux using ordinary removable media. In versions prior to 0.9.2, a symlink race condition exists in per-device and per-user pad directory creation. pam_usb uses a check-then-act pattern: it calls lstat() to test for existence and then calls mkdir() separately to create the directory. A local attacker can win the race between these calls by replacing the target path with a symlink to a directory they control. If successful, one-time pad files may be written to an attacker-controlled location, potentially exposing future pad values before use or disrupting authentication. This issue has been fixed in version 0.9.2.",
  "id": "CVE-2026-48983",
  "modified": "2026-07-08T05:37:47.224722716Z",
  "published": "2026-06-18T19:07:56.198Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mcdope/pam_usb/releases/tag/0.9.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48983.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/mcdope/pam_usb/security/advisories/GHSA-4j8q-67fq-3xc3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48983"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pam_usb: TOCTOU race condition in pad directory creation allows symlink substitution"
}