{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-48983","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-26T23:26:07.975Z","datePublished":"2026-06-18T19:07:56.198Z","dateUpdated":"2026-06-22T12:41:34.711Z"},"containers":{"cna":{"title":"pam_usb: TOCTOU race condition in pad directory creation allows symlink substitution","problemTypes":[{"descriptions":[{"cweId":"CWE-367","lang":"en","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-4j8q-67fq-3xc3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-4j8q-67fq-3xc3"},{"name":"https://github.com/mcdope/pam_usb/releases/tag/0.9.2","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/releases/tag/0.9.2"}],"affected":[{"vendor":"mcdope","product":"pam_usb","versions":[{"version":"< 0.9.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-18T19:07:56.198Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-4j8q-67fq-3xc3","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-22T12:41:19.864255Z","id":"CVE-2026-48983","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-22T12:41:34.711Z"}}]}}