---
id: CVE-2025-58356
title: Constellation is the first Confidential Kubernetes
summary: >-
  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_pass…
severity: none
cwe:
  - CWE-347
published: '2025-10-27'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-58356'
references:
  - url: 'https://github.com/edgelesssys/constellation/pull/3927'
    label: security-advisories@github.com
  - url: 'https://github.com/edgelesssys/constellation/releases/tag/v2.24.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/edgelesssys/constellation/security/advisories/GHSA-hq76-6gh2-5g4q
    label: security-advisories@github.com
  - url: >-
      https://blog.trailofbits.com/2025/10/30/vulnerabilities-in-luks2-disk-encryption-for-confidential-vms/
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00107
epssPercentile: 0.01074
ingestedAt: '2026-10-08T11:31:27.647Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.