Grub2: out-of-bounds read at fs/ntfs.c

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2023-4693
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-10-25 18:17:41 UTC
Updated2026-07-21 06:16:27 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 4.6 MEDIUM from [email protected]

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

EPSS: 0.004960000 probability, percentile 0.393260000 (date 2026-07-21)

Problem Types: CWE-125 | CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.6MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnu Grub2 All All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 1:2.02-156.el8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 1:2.06-77.el9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2024:3184 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
lists.debian.org/debian-lts-announce/2023/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
oss-sec: CVE-2023-4692, CVE-2023-4693: grub2: OOB write, read via specially crafted NTFS filesystem af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
security.gentoo.org/glsa/202311-14 af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
CVE-2023-4692, CVE-2023-4693: vulnerabilities in the GRUB boot manager – My DFIR Blog af854a3a-2127-422b-91ae-364da2661108 dfir.ru Exploit, Third Party Advisory
access.redhat.com/errata/RHSA-2024:2456 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
security.netapp.com/advisory/ntap-20231208-0002 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
2238343 – (CVE-2023-4693) CVE-2023-4693 grub2: out-of-bounds read at fs/ntfs.c af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
[SECURITY PATCH 0/6] GRUB2 NTFS driver vulnerabilities - 2023/10/03 af854a3a-2127-422b-91ae-364da2661108 lists.gnu.org Mailing List
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2023-09-11T00:00:00.000ZReported to Red Hat.
CNA2023-10-03T00:00:00.000ZMade public.

Legacy QID Mappings

  • 199802 Ubuntu Security Notification for GRUB2 Vulnerabilities (USN-6410-1)
  • 356438 Amazon Linux Security Advisory for grub2 : ALAS2-2023-2292
  • 356613 Amazon Linux Security Advisory for grub2 : ALAS2023-2023-409
  • 356635 Amazon Linux Security Advisory for grub2 : ALAS2023-2023-408
  • 6000116 Debian Security Update for grub2 (DLA 3605-1)
  • 6000174 Debian Security Update for grub2 (DSA 5519-1)
  • 673348 EulerOS Security Update for grub2 (EulerOS-SA-2023-3301)
  • 673390 EulerOS Security Update for grub2 (EulerOS-SA-2024-1060)
  • 673506 EulerOS Security Update for grub2 (EulerOS-SA-2023-3333)
  • 673603 EulerOS Security Update for grub2 (EulerOS-SA-2023-3272)
  • 673664 EulerOS Security Update for grub2 (EulerOS-SA-2024-1270)
  • 673921 EulerOS Security Update for grub2 (EulerOS-SA-2024-1141)
  • 674062 EulerOS Security Update for grub2 (EulerOS-SA-2023-3244)
  • 674085 EulerOS Security Update for grub2 (EulerOS-SA-2024-1084)
  • 710796 Gentoo Linux GRUB Multiple Vulnerabilities (GLSA 202311-14)
  • 755093 SUSE Enterprise Linux Security Update for grub2 (SUSE-SU-2023:4085-1)
  • 755116 SUSE Enterprise Linux Security Update for grub2 (SUSE-SU-2023:4130-1)
  • 755125 SUSE Enterprise Linux Security Update for grub2 (SUSE-SU-2023:4141-1)
  • 755126 SUSE Enterprise Linux Security Update for grub2 (SUSE-SU-2023:4140-1)
  • 908007 Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (31685-1)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report