Red Hat Enterprise Linux/OpenShift Container Platform TPM-based Auto-Decryption missing authentication

Summaryinfo

A vulnerability classified as critical was found in Red Hat Enterprise Linux and OpenShift Container Platform. Affected by this issue is some unknown functionality of the component TPM-based Auto-Decryption. Such manipulation leads to missing authentication. This vulnerability is referenced as CVE-2025-4382. The attack can be executed directly on the physical device. No exploit is available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux and OpenShift Container Platform (version unknown) and classified as critical. Affected by this issue is an unknown function of the component TPM-based Auto-Decryption. The manipulation with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured for TPM-based auto-decryption. When GRUB is set to automatically decrypt disks using keys stored in the TPM, it reads the decryption key into system memory. If an attacker with physical access can corrupt the underlying filesystem superblock, GRUB will fail to locate a valid filesystem and enter rescue mode. At this point, the disk is already decrypted, and the decryption key remains loaded in system memory. This scenario may allow an attacker with physical access to access the unencrypted data without any further authentication, thereby compromising data confidentiality. Furthermore, the ability to force this state through filesystem corruption also presents a data integrity concern.

The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2025-4382 since 05/06/2025. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/29/2025).

The vulnerability scanner Nessus provides a plugin with the ID 237073 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : grub2 (SUSE-SU-2025:01615-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (237073). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux
• OpenShift Container Platform

License

• commercial

Website

• Vendor: https://www.redhat.com/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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