VulnerabilityDeferred

CVE-2026-44712

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.

HIGH 8.2EPSS 0.15%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 8.2 HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.15% probability · 5th percentile
CISA KEV: Not listed
Weakness: CWE-78, CWE-88
Source: security-advisories@github.com

References

https://github.com/mcdope/pam_usb/security/advisories/GHSA-jgv5-w6rm-7wxg

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.