CVE-2026-47274

MEDIUM EPSS 3.8%
Published May 27, 20261mo ago · Modified Jun 17, 20262w ago
6.3 CVSS 3.1
Medium
Find Similar
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.3
Exploitability
1.0
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
3.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-427

References 4

  • github.com https://github.com/mcdope/pam_usb/commit/1ee8745920388df48d001a8e61ba629071557937
  • github.com https://github.com/mcdope/pam_usb/commit/52a1fd6413b7ffcc1a5b58ce432be42e7bf0dbd0
  • github.com https://github.com/mcdope/pam_usb/commit/993e73d8bebb1d8e62677388de3402b6ec36b600
  • github.com https://github.com/mcdope/pam_usb/security/advisories/GHSA-pp29-w28g-r9h9

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.