CVE-2025-54770
Grub2: use-after-free in net_set_vlan
- State
- Published
- Severity
- 4.9 Medium
- Published
- Nov 18, 2025
- Updated
- Sep 1, 2026
- Reserved
- Jul 28, 2025
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.9 Medium | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L | redhat |
Weaknesses
- CWE-825 Expired Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
grub2GNU |
|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
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