Vulnerability record/PUBLISHED/Published Oct 25, 2023 10:27:29 UTC

CVE-2023-4693

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.

Base score5.3/ 10

SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorLocalAV

Attack complexityHighAC

Privileges requiredHighPR

User interactionNoneUI

ScopeChangedS

Confidentiality impactHighC

Integrity impactNoneI

Availability impactNoneA

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

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authorityredhat

Last updatedNov 2, 2026 22:40:51 UTC

PublishedOct 25, 2023 10:27:29 UTC

ReservedAug 31, 2023 21:53:46 UTC