CVE-2023-4693
mediumAn out-of-bounds read flaw was found on grub2's NTFS filesystem driver.
Vendor / product: Gnu — grub2
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.
CVSS
4.6
4.6 (CVSS v3.1)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2023-10-25 18:17
Modified: 2026-11-02 23:17
NVD status: Modified
Last synced 1 day ago
Verified against the source API 2026-11-03 07:33 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
gnu / grub2 <2.12
redhat / enterprise_linux 8.0, 9.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2024:2456 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2024:3184 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2023-4693 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2238343 secalert@redhat.com
- https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-ma... secalert@redhat.com
- https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html secalert@redhat.com
- https://seclists.org/oss-sec/2023/q4/37 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2024:2456 af854a3a-2127-422b-91ae-364da2661108
- https://access.redhat.com/errata/RHSA-2024:3184 af854a3a-2127-422b-91ae-364da2661108
- https://access.redhat.com/security/cve/CVE-2023-4693 af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.redhat.com/show_bug.cgi?id=2238343 af854a3a-2127-422b-91ae-364da2661108
- https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-ma... af854a3a-2127-422b-91ae-364da2661108
- https://lists.debian.org/debian-lts-announce/2023/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/mes... af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/mes... af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/mes... af854a3a-2127-422b-91ae-364da2661108
- https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html af854a3a-2127-422b-91ae-364da2661108
- https://seclists.org/oss-sec/2023/q4/37 af854a3a-2127-422b-91ae-364da2661108
- https://security.gentoo.org/glsa/202311-14 af854a3a-2127-422b-91ae-364da2661108
- https://security.netapp.com/advisory/ntap-20231208-0002/ af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:33 UTC · record ↗