---
id: CVE-2025-0690
title: >-
  The read command is used to read the keyboard input from the user, while reads
  it keeps the input length in a 32-bit integer value which is further used to
  reallocate the line buffer to accept the next character
summary: >-
  The read command is used to read the keyboard input from the user, while reads
  it keeps the input length in a 32-bit integer value which is further used to
  reallocate the line buffer to accept the next character. During this process,
  wit…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
published: '2025-02-24'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-0690'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2025:6990'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2025-0690'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2346123'
    label: secalert@redhat.com
  - url: 'https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html'
    label: secalert@redhat.com
tags:
  - nvd
  - exploit-available
epss: 0.00716
epssPercentile: 0.52365
ingestedAt: '2026-06-29T13:24:34.164Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/kaleth4/CVE-2025-0690'
  checkedAt: '2026-09-24T07:52:52.694Z'
exploitAvailable: true
---

## Overview

The read command is used to read the keyboard input from the user, while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process, with a line big enough it's possible to make this variable to overflow leading to a out-of-bounds write in the heap based buffer. This flaw may be leveraged to corrupt grub's internal critical data and secure boot bypass is not discarded as consequence.

## Remediation

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