{
  "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-hxh6-9574-5vp6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-362"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48982.json"
  },
  "details": "pam_usb provides hardware authentication for Linux using ordinary removable media. In versions prior to 0.9.2, when updating a one-time pad file, a temporary file is created using open() without the O_EXCL flag. Without O_EXCL, the create operation is not atomic: two concurrent processes racing to update the same pad may both succeed in opening the file, with the second write silently overwriting the first. The one-time pad is the core replay-prevention mechanism of pam_usb. A successful race could result in the stored pad value diverging from what either process expected, potentially causing authentication failures or, in a precisely timed attack, creating a window for pad reuse. This issue has been fixed in version 0.9.2.",
  "id": "CVE-2026-48982",
  "modified": "2026-07-08T05:36:42.815083463Z",
  "published": "2026-06-18T19:01:08.766Z",
  "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-2026-48982.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/mcdope/pam_usb/security/advisories/GHSA-hxh6-9574-5vp6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48982"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pam_usb: Missing O_EXCL on pad temp file creation allows concurrent update race"
}