CVE-2025-54771
Grub2: use-after-free in grub_file_close()
4.9CVSSMEDIUM
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 Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:LConfidentialityLow
I:LIntegrityLow
A:LAvailabilityLow
Weaknesses
Affected Products
and 7 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
References
https://access.redhat.com/security/cve/CVE-2025-54771
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2413823
bugzilla.redhat.com
https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
lists.gnu.org
and 7 more references View all →
Timeline
Published
Nov 18, 2025
Last Updated
May 19, 2026
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