# CVE-2026-48980

## Summary

- **CVE ID:** CVE-2026-48980
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-454, CWE-807
- **Published:** Jun 18, 2026
- **Last Modified:** Jun 20, 2026

## Description

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.

## Affected Products

- mcdope — pam_usb (< 0.9.2)

## References

- [CNA](https://github.com/mcdope/pam_usb/security/advisories/GHSA-qr83-mf3h-fvqr)
- [CNA](https://github.com/mcdope/pam_usb/releases/tag/0.9.2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._