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6.1
MEDIUM CVSS 3.1
CVE-2025-0690
Grub2: read: integer overflow may lead to out-of-bounds write
Description

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.

INFO

Published Date :

Feb. 24, 2025, 8:15 a.m.

Last Modified :

May 13, 2025, 8:15 p.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-0690 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux
1 Gnu grub2
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Patch the software to fix the heap buffer out-of-bounds write vulnerability.
  • Update the affected software to the latest version.
  • Apply security patches provided by the vendor.
  • Recompile the software with updated libraries.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-0690.

URL Resource
https://access.redhat.com/errata/RHSA-2025:6990
https://access.redhat.com/security/cve/CVE-2025-0690
https://bugzilla.redhat.com/show_bug.cgi?id=2346123
https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-0690 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-0690 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-0690 vulnerability anywhere in the article.

  • BleepingComputer
Microsoft uses AI to find flaws in GRUB2, U-Boot, Barebox bootloaders

Microsoft used its AI-powered Security Copilot to discover 20 previously unknown vulnerabilities in the GRUB2, U-Boot, and Barebox open-source bootloaders. GRUB2 (GRand Unified Bootloader) is the defa ... Read more

Published Date: Mar 31, 2025 (7 months ago)
  • Cyber Security News
Linux Grub Read Command Buffer Overflow Vulnerability Enabling Potential Secure Boot Bypass

A newly disclosed vulnerability in the GRUB2 bootloader’s read command (CVE-2025-0690) has raised concerns about potential Secure Boot bypasses and heap memory corruption in Linux systems. Red Hat Pro ... Read more

Published Date: Feb 25, 2025 (8 months, 1 week ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-0690 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 13, 2025

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2025:6990
  • CVE Modified by [email protected]

    Mar. 05, 2025

    Action Type Old Value New Value
    Added Reference https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html
  • New CVE Received by [email protected]

    Feb. 24, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3.1 AV:P/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
    Added CWE CWE-787
    Added Reference https://access.redhat.com/security/cve/CVE-2025-0690
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2346123
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact