Security Advisory

CVE-2026-47273

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-27 20:03:39

Last updated 2026-05-28 13:26:13

Assigner GitHub_M

CVSS score 6.5

State PUBLISHED

Description

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, pam_usb builds XPath expressions from user-supplied identifiers (PAM username, service name) and device-supplied identifiers (USB device serial, model, vendor) to query /etc/pamusb.conf. These identifiers were not validated for XPath metacharacters, allowing injection of arbitrary XPath predicates. This vulnerability is fixed in 0.9.0.

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