BaseFortify

Publication date: 2025-11-18

Last updated on: 2026-06-30

Assigner: Red Hat, Inc.

Description

A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.

CVSS Scores

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Meta Information

Published

2025-11-18

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2025-11-18

EPSS Evaluated

2026-07-05

NVD

CVE-2025-61664

Affected Vendors & Products

Vendor	Product	Version / Range
gnu	grub	2.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-825	The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.

Attack-Flow Graph

Executive Summary

This vulnerability is a Use After Free flaw in the GRUB2 bootloader's normal module. It happens because the normal_exit command is not properly unregistered when its module is unloaded. An attacker can exploit this by invoking the command after the module is removed, causing the system to access memory that has already been freed, which can lead to a system crash or compromise data confidentiality and integrity.

Impact Analysis

Exploiting this vulnerability can cause the system to crash or potentially lead to unauthorized access or modification of data, impacting both data confidentiality and integrity.

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