CVE-2023-4692
Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-122 |
| Published | Oct 25, 2023 |
| Last Updated | Nov 7, 2025 |
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CVSS v3 Breakdown
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
Affected Versions
Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2024:2456 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:3184 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-4692 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2236613 dfir.ru: https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/ lists.gnu.org: https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html seclists.org: https://seclists.org/oss-sec/2023/q4/37 lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/ security.gentoo.org: https://security.gentoo.org/glsa/202311-14 security.netapp.com: https://security.netapp.com/advisory/ntap-20231208-0002/ lists.debian.org: https://lists.debian.org/debian-lts-announce/2023/10/msg00007.html