Description
An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.
Affected products
gnu: grub2; redhat: enterprise linux
References10
- dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-… ExploitThird Party Advisory
- dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-… ExploitThird Party Advisory
- access.redhat.com/errata/RHSA-2024:2456
- access.redhat.com/errata/RHSA-2024:3184
- access.redhat.com/security/cve/CVE-2023-4693 Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2238343 Issue TrackingThird Party Advisory
- lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html Mailing List
- seclists.org/oss-sec/2023/q4/37 Mailing ListThird Party Advisory
- access.redhat.com/errata/RHSA-2024:2456
- access.redhat.com/errata/RHSA-2024:3184
Metrics
- CVSS 3.1
-
4.6
MEDIUM
Score source: NVD
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 42 · as of 5 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.