CVE-2026-44712CWE-78CWE-88
pam_usb: Shell injection via device UUID and username in pamusb-conf and pamusb-agent
High · published May 27, 2026
What it is
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, a crafted UUID such as $(id>/tmp/rce) in the config causes root RCE when pamusb-conf --reset-pads is run. A USB device with a crafted filesystem UUID (some controllers allow this) can inject the payload at --add-device time. Also, userName from the XML config is passed to os.system() in pamusb-agent, which invokes a shell. This vulnerability is fixed in 0.8.7.
The record
Technical detail
- CVSS v3.1
- 8.2 · HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CVSS v4.0
- Not supplied
- EPSS
- 0.00210 · 10.7th percentile
- Weaknesses
- CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'); CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
- Published
- 2026-05-27T20:24Z
EPSS history
Timeline