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CVE-2023-4692

Published: Oct 25, 2023

Modified: Nov 7, 2025

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.

Vendor	Product	Versions
Unknown	grub	unaffected `2.12 - < *`
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:H/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

vendor-advisory

x_refsource_REDHAT

vendor-advisory

x_refsource_REDHAT

https://access.redhat.com/security/cve/CVE-2023-4692

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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