CVE-2025-61661
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-18

Last updated on: 2025-11-18

Assigner: Red Hat, Inc.

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.
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Meta Information
Published
2025-11-18
Last Modified
2025-11-18
Generated
2026-06-16
AI Q&A
2025-11-18
EPSS Evaluated
2026-06-15
NVD
CVE-2025-61661
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gnu grub 3.1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-131 The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
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Executive Summary

This vulnerability exists in the GRUB bootloader due to improper handling of string conversion when reading data from a USB device. An attacker can exploit inconsistent length values by connecting a malicious USB device during the boot process, causing GRUB to crash or potentially corrupt data.

Impact Analysis

Exploitation of this vulnerability can cause the GRUB bootloader to crash, resulting in a Denial of Service (DoS). There is also a possibility of data corruption, although this is less likely due to the complexity of the exploit.

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