---
cve: "CVE-2026-48066"
severity: "MEDIUM"
cvss: 5.7
epss: "12%"
vendor: "mcdope"
kev: false
exploited: false
published: "2026-05-27 20:16:40"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T20:53:42+02:00"
---

# CVE-2026-48066

> 5.7 MEDIUM · 🧪 PoC

## Beschreibung

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- e2f30b22cd0715fcde0fc62d6ee3e1ca6370b8a9 (Commit)

## Referenzen

- <https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6>
- <https://github.com/mcdope/pam_usb/issues/350>
- <https://github.com/mcdope/pam_usb/issues/55>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48066) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_