CVE-2025-61661

MediumCVSS 4.8/10Last modified Oct 18, 2026

Description

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.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Weakness enumeration

CWE-131

Affected software

No affected versions have been published.

Timeline

Published: Nov 18, 2025
Last modified: Oct 18, 2026
NVD status: Deferred

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