CVE-2023-4001

MediumCVSS 6.8/10Last modified Nov 7, 2026

Description

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.

Metrics

CVSS 3.1 6.8/10CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-290

Affected software

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 9	—
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support	—
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	—
Red Hat	Red Hat Enterprise Linux 8	—

References

Timeline

Published: Jan 15, 2024
Last modified: Nov 7, 2026
NVD status: Modified

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