{"id":"CVE-2026-48066","aliases":["EUVD-2026-32648","GHSA-qg76-57wq-mpv6"],"status":"published","title":"pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication","description":"pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.","severity":{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00116,"percentile":0.01605,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362","CWE-476"],"published":"2026-05-27T19:57:42Z","modified":"2026-10-28T11:11:23Z","products":[{"vendor":"mcdope","product":"pam_usb"}],"references":[{"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://github.com/mcdope/pam_usb/issues/350","tags":["x_refsource_MISC","report"]},{"url":"https://github.com/mcdope/pam_usb/issues/55","tags":["x_refsource_MISC","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48066.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48066","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-48066","title":"pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication","description":"pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.","status":"published","published":"2026-05-27T19:57:42.557Z","modified":"2026-05-28T12:54:38.194Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-362","CWE-476"],"updated_at":"2026-11-02T14:19:47.998488Z"}],"euvd":[{"id":"EUVD-2026-32648","description":"pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.","status":"published","published":"2026-05-27T19:57:42Z","modified":"2026-05-28T12:54:38Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-02T18:21:03.0662Z"}],"nvd":[{"id":"CVE-2026-48066","description":"pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.","status":"published","published":"2026-05-27T20:16:40.543Z","modified":"2026-10-26T11:10:00.157Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-362","CWE-476"],"updated_at":"2026-11-02T14:12:20.885865Z"}],"osv":[{"id":"CVE-2026-48066","title":"pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication","description":"pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.","status":"published","published":"2026-05-27T19:57:42.557Z","modified":"2026-10-28T11:11:23.901462817Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"cwes":["CWE-362","CWE-476"],"updated_at":"2026-11-02T15:45:06.701612Z"}]}}