Use-after-free in grub - CVE-2025-61663
Published: November 21, 2025
Vulnerability identifier: #VU118667
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-61663
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
grub
grub
Detailed vulnerability description
The vulnerability allows an attacker to perform a denial of service attack.
The vulnerability exists due to the normal command is not properly unregistered when the module is unloaded. An attacker with physical access to the system can perform a denial of service attack.
How to mitigate CVE-2025-61663
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.