SecuriTricks - CVE-2025-4382

Description

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.

Product(s) Impacted

Vendor	Product	Versions
Linux	Luks	*
Gnu	Grub	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-306

Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	linux	luks	/	/	/	/	/	/	/	/
a	gnu	grub	/	/	/	/	/	/	/	/

References

https://access.redhat.com/security/cve/CVE-2025-4382

https://bugzilla.redhat.com/show_bug.cgi?id=2364416

CVSS Score

5.9 / 10

CVSS Data - 3.1

Attack Vector: PHYSICAL
Attack Complexity: LOW
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: NONE

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

View Vector String

Timeline

Published: May 9, 2025, 12:15 p.m.
Last Modified: May 9, 2025, 12:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

secalert@redhat.com

CVE-2025-4382