CVE-2026-48792
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 3% of all known CVEs.
References
Related Vulnerabilities
Other CWE-390 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-30255 | Medium | 5.3 | 88% | - | Fix |
| CVE-2024-27919 | High | 7.5 | 87% | - | - |
| CVE-2025-26465 | Medium | 6.8 | 7.4% | - | Fix |
| CVE-2019-5051 | High | 8.8 | 4.0% | - | Fix |
| CVE-2021-40391 | Critical | 9.8 | 2.9% | - | Fix |
| CVE-2017-7485 | Medium | 5.9 | 2.0% | - | - |
Common questions
How do I fix CVE-2026-48792?
No published fix for CVE-2026-48792 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-48792 being actively exploited?
Not that we know of. CVE-2026-48792 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.13% is the estimated probability that it will be exploited in the next 30 days. That is higher than 3% of all scored CVEs.
How severe is CVE-2026-48792?
CVE-2026-48792 has a CVSS v3 base score of 4.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-28.