{"id":"CVE-2025-54771","title":"A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader)","summary":"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…","severity":"medium","cvss":4.9,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-825"],"published":"2025-11-18","updated":"2026-06-25","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-54771","references":[{"url":"https://access.redhat.com/security/cve/CVE-2025-54771","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2413823","label":"secalert@redhat.com"},{"url":"https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html","label":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2025/11/18/3","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00142,"epssPercentile":0.02834,"ingestedAt":"2026-06-29T13:24:34.605Z","slug":"CVE-2025-54771","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":27,"depthScoreParts":{"impact":27,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}