CVE-2023-4692

HIGH

GNU Grub2 < 2.12 - Out-of-Bounds Write

Title source: rule
STIX 2.1

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.

References (13)

Core 13
Core References
Mailing List, Third Party Advisory
https://seclists.org/oss-sec/2023/q4/37
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:2456
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:3184
Third Party Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2023-4692
Issue Tracking, Third Party Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2236613

Scores

CVSS v3 7.5
EPSS 0.0000
EPSS Percentile 0.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-122 CWE-787
Status published
Products (3)
gnu/grub2 < 2.12
redhat/enterprise_linux 8.0
redhat/enterprise_linux 9.0
Published Oct 25, 2023
Tracked Since Feb 18, 2026