VULNERABILITY INTELLIGENCE

CVE-2026-44709

CVSS score7.8 HIGH
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-05-27
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-78

Primary references