CVE-2025-54770

A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.4 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2025-54770
https://bugzilla.redhat.com/show_bug.cgi?id=2413813
https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
http://www.openwall.com/lists/oss-security/2025/11/18/4

Configurations

No configuration.

History

18 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Se ha identificado una vulnerabilidad en el módulo de red del gestor de arranque GRUB2 que plantea un riesgo inmediato de denegación de servicio (DoS). Este fallo es un problema de uso después de liberación, causado porque el comando net_set_vlan no se anula de registro correctamente cuando el módulo de red se descarga de la memoria. Un atacante que pueda ejecutar este comando puede forzar al sistema a acceder a ubicaciones de memoria que ya no son válidas. La explotación exitosa conduce directamente a la inestabilidad del sistema, lo que puede resultar en un fallo completo y detener la disponibilidad del sistema.

Information

Published : 2025-11-18 19:15

Updated : 2026-10-18 20:10

NVD link : CVE-2025-54770

Mitre link : CVE-2025-54770

CVE.ORG link : CVE-2025-54770

JSON object : View

Products Affected

No product.

CWE

CWE-825

Expired Pointer Dereference

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