CVE-2026-47274 | THREATINT

Description

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, multiple pam_usb helper tools resolved external binaries through the PATH environment variable rather than using absolute paths. An attacker who can influence the process environment during PAM authentication or tool execution could substitute malicious binaries. The affected tools are pamusb-check (src/tmux.c), pamusb-conf (tools/pamusb-conf), and pamusb-keyring-unlock-gnome (tools/pamusb-keyring-unlock-gnome). This vulnerability is fixed in 0.9.0.

PUBLISHED Reserved 2026-05-18 | Published 2026-05-27 | Updated 2026-05-30 | Assigner GitHub_M

MEDIUM: 6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-427: Uncontrolled Search Path Element

Product status

< 0.9.0

affected

References

github.com/...am_usb/security/advisories/GHSA-pp29-w28g-r9h9

github.com/...ommit/1ee8745920388df48d001a8e61ba629071557937

github.com/...ommit/52a1fd6413b7ffcc1a5b58ce432be42e7bf0dbd0

github.com/...ommit/993e73d8bebb1d8e62677388de3402b6ec36b600

cve.org (CVE-2026-47274)

nvd.nist.gov (CVE-2026-47274)

Download JSON