CVE-2025-54771

Name: CVE-2025-54771
Creator: NVD / NIST
Published: 2025-11-18T19:15:49.42+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 0.13%

Last modified Jun 25, 2026

CVE-2025-54771 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

Description

A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.

Metrics

CVSS 3.1

4.9/10

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Probability

0.13%

2.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-825

References

Timeline

Published: Nov 18, 2025
Last Modified: Jun 25, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2025-54771?

How severe is CVE-2025-54771?

CVE-2025-54771 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.

How do I fix CVE-2025-54771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-54771?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST