Vulnerability · Published Nov 18, 2025 · Assigned by redhat
CVE-2025-54771Grub2: use-after-free in grub_file_close()
Medium 4.9
In plain English
A medium-severity security flaw in grub2 from GNU. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | grub2 | no fix listed | DEBIAN-CVE-2025-54771 |
| Debian:13 | grub2 | no fix listed | DEBIAN-CVE-2025-54771 |
| Debian:14 | grub2 | 2.14-1 | DEBIAN-CVE-2025-54771 |
| Ubuntu:22.04:LTS | grub2-signed | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:24.04:LTS | grub2-signed | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:25.10 | grub2-signed | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:26.04:LTS | grub2-signed | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:26.10 | grub2-signed | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:22.04:LTS | grub2-unsigned | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:24.04:LTS | grub2-unsigned | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:25.10 | grub2-unsigned | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:26.04:LTS | grub2-unsigned | no fix listed | UBUNTU-CVE-2025-54771 |
| Ubuntu:26.10 | grub2-unsigned | no fix listed | UBUNTU-CVE-2025-54771 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GNU | grub2 | 0 – through 2.14 |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
Weakness: CWE-825 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
References
- https://access.redhat.com/security/cve/CVE-2025-54771 vdb-entry, x_refsource_REDHAT
- RHBZ#2413823 issue-tracking, x_refsource_REDHAT
- https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
- http://www.openwall.com/lists/oss-security/2025/11/18/3