VulnerabilityDeferred

CVE-2026-48066

This vulnerability is fixed in 0.9.1.

MEDIUM 5.7EPSS 0.12%

Does this matter?

Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 5.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
EPSS: 0.12% probability · 2th percentile
CISA KEV: Not listed
Weakness: CWE-362, CWE-476
Source: security-advisories@github.com

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.