Constellation is the first Confidential Kubernetes. The Constellation CVM image uses LUKS2-encrypted volumes for persistent storage. When opening an encrypted storage device, the CVM uses the libcryptsetup function crypt_activate_by_passhrase. If the VM is successful in opening the partition with the disk encryption key, it treats the volume as confidential. However, due to the unsafe handling of null keyslot algorithms in the cryptsetup 2.8.1, it is possible that the opened volume is not encrypted at all. Cryptsetup prior to version 2.8.1 does not report an error when processing LUKS2-formatted disks that use the cipher_null-ecb algorithm in the keyslot encryption field. This vulnerability is fixed in 2.24.0.
History

Tue, 28 Oct 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Edgelesssys
Edgelesssys constellation
Vendors & Products Edgelesssys
Edgelesssys constellation

Mon, 27 Oct 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 27 Oct 2025 19:45:00 +0000

Type Values Removed Values Added
Description Constellation is the first Confidential Kubernetes. The Constellation CVM image uses LUKS2-encrypted volumes for persistent storage. When opening an encrypted storage device, the CVM uses the libcryptsetup function crypt_activate_by_passhrase. If the VM is successful in opening the partition with the disk encryption key, it treats the volume as confidential. However, due to the unsafe handling of null keyslot algorithms in the cryptsetup 2.8.1, it is possible that the opened volume is not encrypted at all. Cryptsetup prior to version 2.8.1 does not report an error when processing LUKS2-formatted disks that use the cipher_null-ecb algorithm in the keyslot encryption field. This vulnerability is fixed in 2.24.0.
Title Constellation allows insecure use of LUKS2 persistent storage partitions
Weaknesses CWE-347
References
Metrics cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-10-27T19:33:23.969Z

Updated: 2025-10-27T19:44:45.350Z

Reserved: 2025-08-29T16:19:59.010Z

Link: CVE-2025-58356

cve-icon Vulnrichment

Updated: 2025-10-27T19:44:29.774Z

cve-icon NVD

Status : Received

Published: 2025-10-27T20:15:53.480

Modified: 2025-10-27T20:15:53.480

Link: CVE-2025-58356

cve-icon Redhat

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