{"id":"CVE-2026-48792","summary":"pam_usb: pusb_has_virtual_input_device() silently discards EACCES, disabling remote desktop detection under non-root execution","details":"pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/evdev.c silently ignores EACCES errors when opening /dev/input/event* nodes, causing pusb_has_virtual_input_device() to return 0 (no virtual devices found) even when every open() call failed due to insufficient permissions. The caller in src/local.c cannot distinguish a clean absence of virtual devices from a permission-denied scan, and acts on the false negative by continuing authentication without denying. This vulnerability is fixed in 0.9.1.","aliases":["GHSA-pvrg-chgw-x42c"],"modified":"2026-07-08T08:13:40.005401339Z","published":"2026-05-27T19:55:46.392Z","database_specific":{"cwe_ids":["CWE-390","CWE-693"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48792.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48792.json"},{"type":"ADVISORY","url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-pvrg-chgw-x42c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48792"},{"type":"REPORT","url":"https://github.com/mcdope/pam_usb/issues/351"},{"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-2026-48792.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}