CVE-2025-4382
published 2025-05-09CVE-2025-4382: 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…
PriorityP432medium5.9CVSS 3.1
AVPACLPRLUINSUCHIHAN
EPSS
0.32%
24.3th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | grub2 | < grub2 2.14~git20250718.0e36779-2 (forky) | grub2 2.14~git20250718.0e36779-2 (forky) |
| gnu | grub2 | >= 0 < 2.14~git20250718.0e36779-2 | 2.14~git20250718.0e36779-2 |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
osv5.9MEDIUM
vendor_debian5.9MEDIUM
vendor_redhat5.9MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
CVE-2025-4382: A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured for TPM-based auto-decryption
osv·2025-05-09·CVSS 5.9
CVE-2025-4382 [MEDIUM] CVE-2025-4382: A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured for TPM-based auto-decryption
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.
GHSA
GHSA-4h4m-5x9g-8whv: A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured for TPM-based auto-decryption
ghsa_unreviewed·2025-05-09
CVE-2025-4382 [MEDIUM] CWE-306 GHSA-4h4m-5x9g-8whv: A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured for TPM-based auto-decryption
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.
Red Hat
grub2: grub allow access to encrypted device through CLI once root device is unlocked via TPM
vendor_redhat·2025-05-08·CVSS 5.9
CVE-2025-4382 [MEDIUM] CWE-306 grub2: grub allow access to encrypted device through CLI once root device is unlocked via TPM
grub2: grub allow access to encrypted device through CLI once root device is unlocked via TPM
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 t
Debian
CVE-2025-4382: grub2 - A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured ...
vendor_debian·2025·CVSS 5.9
CVE-2025-4382 [MEDIUM] CVE-2025-4382: grub2 - A flaw was found in systems utilizing LUKS-encrypted disks with GRUB configured ...
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.
Scope: local
bookworm: ope
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://access.redhat.com/security/cve/CVE-2025-4382https://bugzilla.redhat.com/show_bug.cgi?id=2364416https://gitweb.git.savannah.gnu.org/gitweb/?p=grub.git;a=blobdiff;f=grub-core/kern/rescue_reader.c;h=a71ada8fb7da2eae6ee7135fe234fb1755ca78b0;hp=4259857ba9eea45446bc40ea13c3de4ab1b88ffd;hb=c448f511e74cb7c776b314fcb7943f98d3f22b6d;hpb=4abac0ad5a7914dd3cdfff08aaac06588bf98d80
2025-05-09
Published