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Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package grub2-efi-x64-cdboot  (opens in a new tab)

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EPSS
0.5% (39th percentile)

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  • Snyk IDSNYK-RHEL9-GRUB2EFIX64CDBOOT-12418915
  • published1 Sept 2025
  • disclosed3 Oct 2023
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Introduced: 3 Oct 2023

CVE-2023-4693  (opens in a new tab)
CWE-125  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-efi-x64-cdboot package and not the grub2-efi-x64-cdboot package as distributed by RHEL.

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.

References