CVE-2026-48983 pam_usb: TOCTOU race condition in pad directory creation allows symlink substitution

pamusb 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. pamusb uses a check-then-act pattern: it calls lstat to test for existence and then calls mkdir separate...

CVE-2026-48983

CVE-2026-48983 affects pam_usb prior to version 0.9.2, where a TOCTOU race in per-device and per-user pad directory creation can be exploited via a symlink substitution. pam_usb performs a check-then-act using lstat() followed by mkdir(), allowing a local attacker to replace the target path with ...

SUSE CVE-2024-8244

The filepath.Walk and filepath.WalkDir functions are documented as not following symbolic links, but both functions are susceptible to a TOCTOU time of check/time of use race condition where a portion of the path being walked is replaced with a symbolic link while the walk is in progress...