CVE-2023-4693
Grub2: out-of-bounds read at fs/ntfs.c
02 Description
Grub2: out-of-bounds read at fs/ntfs.c
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.48% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 41.7% of scored records. A rank, not a probability.
- NVD base score
- 4.6 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-07-21.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-10-25 10:27Z3 YR AGO
- Last updated
- 2026-07-21 05:09Z3 MO AGO
- Reserved
- 2023-08-31
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.3)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.2
- Document digest
- d26bcfa055e2ab37f00e3188c74a5b6992c46f6a10beeb959e60b368d4372b64
05 Affected products
06 References
- access.redhat.comRHSA-2024:2456https://access.redhat.com/errata/RHSA-2024:2456
- access.redhat.comRHSA-2024:3184https://access.redhat.com/errata/RHSA-2024:3184
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4693
- bugzilla.redhat.comRHBZ#2238343https://bugzilla.redhat.com/show_bug.cgi?id=2238343
- dfir.ruhttps://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/
- lists.gnu.orghttps://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html
- seclists.orghttps://seclists.org/oss-sec/2023/q4/37
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
- security.gentoo.orghttps://security.gentoo.org/glsa/202311-14
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20231208-0002/
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/10/msg00007.html
07 Fixed in
AlmaLinux 8
- grub2-common Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-aa64 Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-aa64-cdboot Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-aa64-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-ia32 Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-ia32-cdboot Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-ia32-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-x64 Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-x64-cdboot Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-x64-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-pc Fixed in 1:2.02-156.el8.alma.1
- grub2-pc-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-ppc64le Fixed in 1:2.02-156.el8.alma.1
- grub2-ppc64le-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-tools Fixed in 1:2.02-156.el8.alma.1
- grub2-tools-efi Fixed in 1:2.02-156.el8.alma.1
- grub2-tools-extra Fixed in 1:2.02-156.el8.alma.1
- grub2-tools-minimal Fixed in 1:2.02-156.el8.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- grub2-common Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-aa64 Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-aa64-cdboot Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-aa64-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-x64 Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-x64-cdboot Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-x64-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-pc Fixed in 1:2.06-77.el9.alma.1
- grub2-pc-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-ppc64le Fixed in 1:2.06-77.el9.alma.1
- grub2-ppc64le-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-tools Fixed in 1:2.06-77.el9.alma.1
- grub2-tools-efi Fixed in 1:2.06-77.el9.alma.1
- grub2-tools-extra Fixed in 1:2.06-77.el9.alma.1
- grub2-tools-minimal Fixed in 1:2.06-77.el9.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- grub2-common Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-aa64 Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-aa64-cdboot Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-aa64-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-ia32 Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-ia32-cdboot Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-ia32-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-x64 Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-x64-cdboot Fixed in 1:2.02-156.el8.alma.1
- grub2-efi-x64-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-pc Fixed in 1:2.02-156.el8.alma.1
- grub2-pc-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-ppc64le Fixed in 1:2.02-156.el8.alma.1
- grub2-ppc64le-modules Fixed in 1:2.02-156.el8.alma.1
- grub2-tools Fixed in 1:2.02-156.el8.alma.1
- grub2-tools-efi Fixed in 1:2.02-156.el8.alma.1
- grub2-tools-extra Fixed in 1:2.02-156.el8.alma.1
- grub2-tools-minimal Fixed in 1:2.02-156.el8.alma.1
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- grub2-common Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-aa64 Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-aa64-cdboot Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-aa64-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-x64 Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-x64-cdboot Fixed in 1:2.06-77.el9.alma.1
- grub2-efi-x64-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-pc Fixed in 1:2.06-77.el9.alma.1
- grub2-pc-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-ppc64le Fixed in 1:2.06-77.el9.alma.1
- grub2-ppc64le-modules Fixed in 1:2.06-77.el9.alma.1
- grub2-tools Fixed in 1:2.06-77.el9.alma.1
- grub2-tools-efi Fixed in 1:2.06-77.el9.alma.1
- grub2-tools-extra Fixed in 1:2.06-77.el9.alma.1
- grub2-tools-minimal Fixed in 1:2.06-77.el9.alma.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- grub2 Fixed in 2.06-13+deb12u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- grub2 Fixed in 2.12~rc1-11
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- grub2 Fixed in 2.12~rc1-11
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- grub2-signed No fix yet
- grub2-unsigned No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- grub2-signed No fix yet
- grub2-unsigned No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- grub2-signed Fixed in 1.187.6~20.04.1
- grub2-unsigned Fixed in 2.06-2ubuntu14.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- grub2-signed Fixed in 1.187.6
- grub2-unsigned Fixed in 2.06-2ubuntu14.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- grub2-signed Fixed in 1.199
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- grub2-signed No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.