CVE-2025-61663
MEDIUM EPSS 1.6%
Published Nov 18, 20257mo ago · Modified Jun 17, 20261w ago
4.9 CVSS 3.1
Published Nov 18, 2025 7mo ago
Last Modified Jun 17, 2026 1w ago
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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low
Threat Intelligence
EPSS Exploit Probability
1.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-825
References 2
- access.redhat.com https://access.redhat.com/security/cve/CVE-2025-61663
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2414684
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.