Is CVE-2023-4693 in the CISA KEV catalog?

No. CVE-2023-4693 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-4693?

CVE-2023-4693 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2023-4693?

CVE-2023-4693 has an EPSS score of 0.50% (39th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-4693?

Upgrade grub2 on debian 11 to 2.06-3~deb11u6 or later. Fixes are available for 61 affected products.

CVE & CISA-KEV Catalog

CVE-2023-4693

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

grub2Debian

Fixed in:2.06-3~deb11u6CVE-2023-4693

Fixed in:2.06-13+deb12u1CVE-2023-4693

Fixed in:2.12~rc1-11CVE-2023-4693

grub2Rocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2Red Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-commonRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-commonRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-debuginfoRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-debuginfoRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-debugsourceRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-debugsourceRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-aa64Rocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-aa64Red Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-aa64-cdbootRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-aa64-cdbootRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-aa64-modulesRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-aa64-modulesRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-ia32Red Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

grub2-efi-ia32Rocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

grub2-efi-ia32-cdbootRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

grub2-efi-ia32-cdbootRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

grub2-efi-ia32-modulesRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

grub2-efi-ia32-modulesRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

grub2-efi-x64Red Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-x64Rocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-x64-cdbootRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-x64-cdbootRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-x64-modulesRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-efi-x64-modulesRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-emu-debuginfoRed Hat / RHEL

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-emu-debuginfoRocky

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-pcRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-pcRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-pc-modulesRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-pc-modulesRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-ppc64leRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-ppc64leRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-ppc64le-modulesRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-ppc64le-modulesRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-toolsRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-toolsRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-debuginfoRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-debuginfoRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-efiRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-efiRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-efi-debuginfoRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-efi-debuginfoRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-extraRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-extraRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-extra-debuginfoRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-extra-debuginfoRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-minimalRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-minimalRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-minimal-debuginfoRed Hat / RHEL

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub2-tools-minimal-debuginfoRocky

Fixed in:1:2.02-156.el8RHSA-2024:3184

Fixed in:1:2.06-77.el9RHSA-2024:2456

grub-efi-amd64Ubuntu

Fixed in:2.06-2ubuntu14.4USN-6410-1

Fixed in:2.06-2ubuntu17.2USN-6410-1

grub-efi-amd64-binUbuntu

Fixed in:2.06-2ubuntu14.4USN-6410-1

Fixed in:2.06-2ubuntu17.2USN-6410-1

grub-efi-amd64-signedUbuntu

Fixed in:1.187.6~20.04.1+2.06-2ubuntu14.4USN-6410-1

Fixed in:1.187.6+2.06-2ubuntu14.4USN-6410-1

Fixed in:1.193.2+2.06-2ubuntu17.2USN-6410-1

grub-efi-arm64Ubuntu

Fixed in:2.06-2ubuntu14.4USN-6410-1

Fixed in:2.06-2ubuntu17.2USN-6410-1

grub-efi-arm64-binUbuntu

Fixed in:2.06-2ubuntu14.4USN-6410-1

Fixed in:2.06-2ubuntu17.2USN-6410-1

grub-efi-arm64-signedUbuntu

Fixed in:1.187.6~20.04.1+2.06-2ubuntu14.4USN-6410-1

Fixed in:1.187.6+2.06-2ubuntu14.4USN-6410-1

Fixed in:1.193.2+2.06-2ubuntu17.2USN-6410-1

grub2-signedUbuntu

Fixed in:1.187.6~20.04.1USN-6410-1

Fixed in:1.187.6USN-6410-1

Fixed in:1.193.2USN-6410-1

grub2-unsignedUbuntu

Fixed in:2.06-2ubuntu14.4USN-6410-1

Fixed in:2.06-2ubuntu17.2USN-6410-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.50%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Exploit1

dfir.ru

Third-Party Advisory3

Mailing List1

lists.gnu.org

Other references8

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.