CVE-2023-4692

Name: CVE-2023-4692
Creator: NVD / NIST
Published: 2023-10-25T18:17:41.743+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2023-4692 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.54%

41.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gnu	Grub2	< 2.12
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0

References

https://access.redhat.com/errata/RHSA-2024:2456
https://access.redhat.com/errata/RHSA-2024:3184
https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue Tracking, Third Party Advisory
https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/Exploit, Third Party Advisory
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
https://seclists.org/oss-sec/2023/q4/37Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2456
https://access.redhat.com/errata/RHSA-2024:3184
https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue Tracking, Third Party Advisory
https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00007.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
https://seclists.org/oss-sec/2023/q4/37Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202311-14
https://security.netapp.com/advisory/ntap-20231208-0002/

Timeline

Published: Oct 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4692?

How severe is CVE-2023-4692?

CVE-2023-4692 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4692?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4692?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST