SecuriTricks - CVE-2026-48980

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.

Product(s) Impacted

Vendor	Product	Versions
Pam Usb	Pam Usb	<0.9.2

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-454

External Initialization of Trusted Variables or Data Stores

The product initializes critical internal variables or data stores using inputs that can be modified by untrusted actors.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	pam_usb	pam_usb	<0.9.2	/	/	/	/	/	/	/

References

https://github.com/mcdope/pam_usb/releases/tag/0.9.2

https://github.com/mcdope/pam_usb/security/advisories/GHSA-qr83-mf3h-fvqr

CVSS Score

6.3 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: HIGH
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: NONE

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

View Vector String

Timeline

Published: June 18, 2026, 8:16 p.m.
Last Modified: June 18, 2026, 9:16 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-48980