---
id: CVE-2025-61663
title: >-
  A vulnerability has been identified in the GRUB2 bootloader's normal command
  that poses an immediate Denial of Service (DoS) risk
summary: >-
  A vulnerability has been identified in the GRUB2 bootloader's normal command
  that poses an immediate Denial of Service (DoS) risk. This flaw is a
  Use-after-Free issue, caused because the normal command is not properly
  unregistered when t…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-825
published: '2025-11-18'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-61663'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-61663'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2414684'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00129
epssPercentile: 0.02966
ingestedAt: '2026-06-29T13:24:34.608Z'
---

## Overview

A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.