CVE-2026-48066: Mcdope Pam USB

Medium severity, CVSS 5.7. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Mcdope Pam USB: before 0.9.1 (fixed in 0.9.1)

Published 2026-05-27. Last modified 2026-06-17.