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CVE-2025-61663

Grub2: missing unregister call for normal commands may lead to use-after-free

Published: Nov 18, 2025Updated: Nov 19, 2025 Sources: CVE List NVD BDUCWE-825
NVD MITRE
4.9CVSSMEDIUM
EPSS Score
0.1%
Top 98.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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

AV:LAC:HPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-825

Affected Products

grub2GNUOSS Libraries
Red Hat Enterprise Linux 10Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 7Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 9Red Hat
On-premOS
Operating Systems / linux-distro
gnuoss-projectUSOSS Librariesaka g. nu
red hatcommercialUSOperating Systemsaka red hat
and 7 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

References

https://access.redhat.com/security/cve/CVE-2025-61663
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2414684
bugzilla.redhat.com
https://access.redhat.com/security/cve/cve-2025-61663
access.redhat.com
and 5 more references View all →

Timeline

Published
Nov 18, 2025
Last Updated
Nov 19, 2025

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