CVE-2026-48980

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.

CVSS 3.1

6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-25)

CWEs

CWE-454, CWE-807

Published

2026-06-18

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

References

• https://github.com/mcdope/pam_usb/releases/tag/0.9.2
• https://github.com/mcdope/pam_usb/security/advisories/GHSA-qr83-mf3h-fvqr

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