CVE-2025-61661
Grub2: out-of-bounds write
Description
A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.
INFO
Published Date :
Nov. 18, 2025, 7:15 p.m.
Last Modified :
Nov. 18, 2025, 10:15 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-61661
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.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the GRUB bootloader to the latest version.
- Apply vendor-provided security patches for GRUB.
- Remove the affected GRUB component if possible.
- Review system boot processes for integrity.
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-2025-61661.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-61661 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2413827 | |
| http://www.openwall.com/lists/oss-security/2025/11/18/8 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-61661 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-2025-61661
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-2025-61661 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-61661 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 18, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/11/18/8 -
New CVE Received by [email protected]
Nov. 18, 2025
Action Type Old Value New Value Added Description A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited. Added CVSS V3.1 AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H Added CWE CWE-131 Added Reference https://access.redhat.com/security/cve/CVE-2025-61661 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2413827