CVE-2026-48980
pam_usb: getenv() used in PAM context allows environment variable injection into local-check logic
CVSS Score
6.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-454 CWE-807 |
| Vendor | mcdope |
| Product | pam_usb |
| Published | Jun 18, 2026 |
| Last Updated | Jun 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
mcdope / pam_usb
< 0.9.2