---
id: CVE-2025-54771
title: >-
  A use-after-free vulnerability has been identified in the GNU GRUB (Grand
  Unified Bootloader)
summary: >-
  A use-after-free vulnerability has been identified in the GNU GRUB (Grand
  Unified Bootloader). The flaw occurs because the file-closing process
  incorrectly retains a memory pointer, leaving an invalid reference to a file
  system structure…
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-2025-54771'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-54771'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2413823'
    label: secalert@redhat.com
  - url: 'https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html'
    label: secalert@redhat.com
  - url: 'http://www.openwall.com/lists/oss-security/2025/11/18/3'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00142
epssPercentile: 0.02834
ingestedAt: '2026-06-29T13:24:34.605Z'
---

## Overview

A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.

## Remediation

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