PT-2026-44091 · Pam Usb · Pam Usb

Mcdope · Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-48792

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions pam usb versions prior to 0.9.1

Description In the src/evdev.c file, the pusb has virtual input device() function silently ignores EACCES errors when opening /dev/input/event* nodes. This behavior causes the function to return 0, indicating no virtual devices were found, even if all open() calls failed due to insufficient permissions. Consequently, the caller in src/local.c cannot differentiate between a genuine absence of virtual devices and a scan blocked by permission denials, leading the system to continue authentication without denying access. This effectively disables remote desktop detection during non-root execution.

Recommendations Update to version 0.9.1.

Fix

Protection Mechanism Failure

Weakness Enumeration

CWE-693

CWE-390

Related Identifiers

CVE-2026-48792

Affected Products

Pam Usb

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-48792 · Security Note
• https://github.com/mcdope/pam_usb/issues/55 · Note
• https://github.com/mcdope/pam_usb/security/advisories/GHSA-pvrg-chgw-x42c · Note
• https://github.com/mcdope/pam_usb/issues/351 · Note
• https://t.me/CVEtracker/55164 · Telegram Post