CVE-2026-48980

Summary

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 Software

VendorProductVersion RangeStatus
mcdopepam_usb< 0.9.2affected

Weaknesses

  • CWE-454: CWE-454: External Initialization of Trusted Variables or Data Stores
  • CWE-807: CWE-807: Reliance on Untrusted Inputs in a Security Decision

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References