VulnerabilityDeferred

CVE-2025-54771

A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader).

MEDIUM 4.9EPSS 0.15%

Does this matter?

Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 4.9 MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS: 0.15% probability · 4th percentile
CISA KEV: Not listed
Weakness: CWE-825
Source: secalert@redhat.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.