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Authentication Bypass The advisory has been revoked - it doesn't affect any version of package grub2-efi-x64-cdboot  (opens in a new tab)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
0.54% (42nd percentile)

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  • Snyk IDSNYK-RHEL9-GRUB2EFIX64CDBOOT-12417436
  • published1 Sept 2025
  • disclosed9 Jan 2024
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Introduced: 9 Jan 2024

CVE-2023-4001  (opens in a new tab)
CWE-290  (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 authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package.