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CWE

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CVE-2023-4693

Published: Oct 25, 2023

Modified: Nov 7, 2025

PUBLISHED

CVSS v3.1

5.3

MEDIUM

Description

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.

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 8	unaffected `1:2.02-156.el8 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `1:2.06-77.el9 - < *`
Red Hat	Red Hat Enterprise Linux 7	All versions

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

References

vendor-advisory

x_refsource_REDHAT

vendor-advisory

x_refsource_REDHAT

https://access.redhat.com/security/cve/CVE-2023-4693

vdb-entry

x_refsource_REDHAT

issue-tracking

x_refsource_REDHAT

https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/

https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html

https://seclists.org/oss-sec/2023/q4/37

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