SecuriTricks - CVE-2025-54770

Description

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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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

Product(s) Impacted

Product	Versions
grub2	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-825

Expired Pointer Dereference

The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.

References

https://access.redhat.com/security/cve/CVE-2025-54770

https://bugzilla.redhat.com/show_bug.cgi?id=2413813

http://www.openwall.com/lists/oss-security/2025/11/18/4

CVSS Score

4.9 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: LOW
Availability Impact: LOW

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

View Vector String

Timeline

Published: Nov. 18, 2025, 7:15 p.m.
Last Modified: Nov. 19, 2025, 7:14 p.m.

Status : Awaiting Analysis

CVE has been marked for Analysis. Normally once in this state the CVE will be analyzed by NVD staff within 24 hours.

More info

Source

secalert@redhat.com

CVE-2025-54770