CVE-2023-4693 MEDIUM

CVE-2023-4693: Grub2: out-of-bounds read at fs/ntfs.c

Vendor Red Hat
Product Red Hat Enterprise Linux 7
Weakness CWE-125
Published October 25, 2023
Last update November 7, 2025

CVSS base score

5.3/10
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N

What the vulnerability does

01Description

An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.

Key dates

02Disclosure timeline

October 25, 2023 CVE published
November 7, 2025 Record updated