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.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3605-1 grub2 security update
Debian DSA Debian DSA DSA-5519-1 grub2 security update
EUVD EUVD EUVD-2023-54543 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.
Ubuntu USN Ubuntu USN USN-6410-1 GRUB2 vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-11-07T00:30:50.177Z

Reserved: 2023-08-31T21:53:09.692Z

Link: CVE-2023-4692

cve-icon Vulnrichment

Updated: 2025-11-04T19:25:43.776Z

cve-icon NVD

Status : Modified

Published: 2023-10-25T18:17:41.743

Modified: 2025-11-04T20:17:11.233

Link: CVE-2023-4692

cve-icon Redhat

Severity : Low

Publid Date: 2023-10-03T00:00:00Z

Links: CVE-2023-4692 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses