---
id: CVE-2025-1125
title: >-
  When reading data from a hfs filesystem, grub's hfs filesystem module uses
  user-controlled parameters from the filesystem metadata to calculate the
  internal buffers size, however it misses to properly check for integer
  overflows
summary: >-
  When reading data from a hfs filesystem, grub's hfs filesystem module uses
  user-controlled parameters from the filesystem metadata to calculate the
  internal buffers size, however it misses to properly check for integer
  overflows. A malic…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: gnu
product: grub2
affected:
  - grub2 <= 2.12
published: '2025-03-03'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-1125'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-1125'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2346138'
    label: secalert@redhat.com
  - url: 'https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00427
epssPercentile: 0.34334
ingestedAt: '2026-06-29T13:24:34.179Z'
---

## Overview

When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculation to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result the hfsplus_open_compressed_real() function will write past of the internal buffer length. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution by-passing secure boot protections.

## Affected

- `grub2 <= 2.12`

## Remediation

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