---
cve: "CVE-2025-61661"
severity: "MEDIUM"
cvss: 4.8
epss: "19%"
vendor: "GNU"
kev: false
exploited: false
published: "2025-11-18 19:15:49"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T06:57:37+02:00"
---

# CVE-2025-61661

> 4.8 MEDIUM

## Beschreibung

A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Physisch | 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 |

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2025-61661>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2413827>
- <http://www.openwall.com/lists/oss-security/2025/11/18/8>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-61661) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_