CVE-2026-44709

Published: May 27, 2026Modified: Jun 17, 2026Deferred

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: security-advisories@github.com (Secondary)

Description

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, pamusb-pinentry reads the PINENTRY_FALLBACK_APP environment variable and executes it directly without any validation. Any process that can set environment variables before pamusb-pinentry is invoked can point PINENTRY_FALLBACK_APP at an arbitrary binary or script and have it executed with the privileges of the pam_usb tool chain. This vulnerability is fixed in 0.8.7.

Related CWEs

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References (2)

https://github.com/mcdope/pam_usb/security/advisories/GHSA-jxrj-q67x-wr4c

Source: security-advisories@github.com

https://github.com/mcdope/pam_usb/security/advisories/GHSA-jxrj-q67x-wr4c

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.