CVE-2025-61663
Grub2: missing unregister call for normal commands may lead to use-after-free
- State
- Published
- Severity
- 4.9 Medium
- Published
- Nov 18, 2025
- Updated
- Sep 1, 2026
- Reserved
- Sep 29, 2025
Description
A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid.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. Impact on the data integrity and confidentiality is also not discarded.
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
- https://access.redhat.com/security/cve/CVE-2025-61663vdb-entry
- RHBZ#2414684issue-tracking
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