What is CVE-2026-48066?

CVE-2026-48066 is a medium-severity vulnerability in Mcdope Pam_usb, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.7/10. Published 2026-05-27.

How severe is CVE-2026-48066?

Medium severity. CVSS v3 base score is 5.7 out of 10.

NULL pointer dereference in Mcdope Pam_usb

CVE-2026-48066

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 vi…

Vulnerability class: Race Condition

EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Mcdope Pam_usb — versions < 0.9.1

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-48066?: CVE-2026-48066 is a medium-severity vulnerability in Mcdope Pam_usb, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.7/10. Published 2026-05-27.
How severe is CVE-2026-48066?: Medium severity. CVSS v3 base score is 5.7 out of 10.