Vulnerability in Gnu Grub2
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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
EPSS: 0.001 (4.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-54770?
- CVE-2025-54770 is a medium-severity vulnerability in Gnu Grub2, classified under CWE-825. CVSS score: 4.9/10. Published 2025-11-18.
- How severe is CVE-2025-54770?
- Medium severity. CVSS v3 base score is 4.9 out of 10.