PT-2026-44113 · Mcdope · Pam Usb

Mcdope · Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-44713

NVD

CVSS v3.1

8.8

High

Base vector

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

pam usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/tmux.c reads the user's $TMUX environment variable, splits it on commas, and interpolates the socket-path component directly into a shell command passed to popen(). Because the value is placed inside double-quotes without sanitisation, any value containing " terminates the quoted string and injects arbitrary shell syntax. popen() runs as root inside the PAM stack. This vulnerability is fixed in 0.8.7.

Fix

Improper Encoding or Escaping of Output

OS Command Injection

Weakness Enumeration

CWE-116

CWE-78

Related Identifiers

CVE-2026-44713

Affected Products

Pam Usb

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-44713 · Security Note
• https://github.com/mcdope/pam_usb/security/advisories/GHSA-822m-whrh-vrj8 · Note