{"id":"CVE-2026-48066","summary":"pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication","details":"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.","aliases":["GHSA-qg76-57wq-mpv6"],"modified":"2026-08-07T21:32:40.225888Z","published":"2026-05-27T19:57:42.557Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48066.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-362","CWE-476"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48066.json"},{"type":"ADVISORY","url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48066"},{"type":"REPORT","url":"https://github.com/mcdope/pam_usb/issues/350"},{"type":"REPORT","url":"https://github.com/mcdope/pam_usb/issues/55"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mcdope/pam_usb","events":[{"introduced":"0"},{"fixed":"e2f30b22cd0715fcde0fc62d6ee3e1ca6370b8a9"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.9.1"}],"source":"AFFECTED_FIELD"}}],"versions":["0.9.0","0.8.7","0.8.4","0.8.3","v0.8.0","0.7.3","0.7.2","0.7.1","v0.7.0","0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48066.json","vanir_signatures_modified":"2026-08-07T21:32:40Z","vanir_signatures":[{"digest":{"line_hashes":["32897324108646938673138056869665931337"],"threshold":0.9},"id":"CVE-2026-48066-b792a2ae","signature_type":"Line","signature_version":"v1","source":"https://github.com/mcdope/pam_usb/commit/e2f30b22cd0715fcde0fc62d6ee3e1ca6370b8a9","target":{"file":"src/version.h"},"deprecated":false}]}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}