pam_usb: TOCTOU race condition in pad directory creation allows symlink substitution_CVE-2026-48983
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 t...