# CVE-2025-54771

## Summary

- **CVE ID:** CVE-2025-54771
- **Severity:** MEDIUM
- **CVSS Score:** 4.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
- **CWE:** CWE-825
- **Published:** Nov 18, 2025
- **Last Modified:** Sep 1, 2026

## 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.

## Affected Products

- GNU — grub2 (0)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2025-54771)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2413823)
- [CVE](http://www.openwall.com/lists/oss-security/2025/11/18/3)
- [CNA](https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._