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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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

This vulnerability has been rated as have the impact of Moderate by the Red Hat Product Security team. This decision was made based in the fact an attacker needs local or physical access to the machine, to execute the the net_set_vlan command after it was unloaded. Additionally the most likely outcome from an successful attack is a Denial of Service by leading the grub2 to crash.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

There's no known mitigation available for this vulnerability.