CVE-2026-48792

MEDIUM EPSS 2.9%
Published May 27, 20261mo ago · Modified Jun 17, 20262w ago
4.4 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 0.9.1, src/evdev.c silently ignores EACCES errors when opening /dev/input/event* nodes, causing pusb_has_virtual_input_device() to return 0 (no virtual devices found) even when every open() call failed due to insufficient permissions. The caller in src/local.c cannot distinguish a clean absence of virtual devices from a permission-denied scan, and acts on the false negative by continuing authentication without denying. This vulnerability is fixed in 0.9.1.

CVSS Details

Base Score
4.4
Exploitability
1.8
Impact
2.5
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
2.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-390
CWE-693

References 3

  • github.com https://github.com/mcdope/pam_usb/issues/351
  • github.com https://github.com/mcdope/pam_usb/issues/55
  • github.com https://github.com/mcdope/pam_usb/security/advisories/GHSA-pvrg-chgw-x42c

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.