Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/mcdope/pam_usb/issues/350
- https://github.com/mcdope/pam_usb/issues/55
- https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6
FAQ
What is CVE-2026-48066?
CVE-2026-48066 is a vulnerability with a CVSS score of 5.7 (MEDIUM). 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 add...
How severe is CVE-2026-48066?
CVE-2026-48066 has been rated MEDIUM with a CVSS base score of 5.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48066?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.