PT-2026-50781 · Mcdope · Pam Usb

Published 2026-06-18 · Updated 2026-06-18 · CVE-2026-48980

NVD

CVSS v3.1

6.3

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

pam usb provides hardware authentication for Linux using removable media. In versions prior to 0.9.2, getenv() environment variables XRDP SESSION, DISPLAY and TMUX allow environment variable injection into local-check logic. These environment variables influence whether a current session is local or remote, and a PAM module that runs in the context of setuid binaries (sudo, su), getenv() returns attacker-controlled values whenever the process environment has been manipulated by a local user. This issue has been fixed in version 0.9.2.

Fix

Weakness Enumeration

CWE-454

CWE-807

Related Identifiers

CVE-2026-48980

Affected Products

Pam Usb

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-48980 · Security Note
• https://github.com/mcdope/pam_usb/releases/tag/0.9.2 · Note
• https://github.com/mcdope/pam_usb/security/advisories/GHSA-qr83-mf3h-fvqr · Note