Constellation allows insecure use of LUKS2 persistent storage partitions
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass, Information disclosure
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-347 and CWE-552.
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_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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| edgelesssys | constellation | before 2.24.0 | 2.24.0 | Patch available | CNA |
| — | github.com/edgelesssys/constellation/v2 (Go) | before 2.24.0 | 2.24.0 | Patch available | GHSA-hq76-6gh2-5g4q |
- constellation Vendoredgelesssys Affected before 2.24.0 Fixed in 2.24.0 Patch available CNA
- github.com/edgelesssys/constellation/v2 (Go) Vendor— Affected before 2.24.0 Fixed in 2.24.0 Patch available GHSA-hq76-6gh2-5g4q
Remediation
- Fix · CNA constellation (edgelesssys) Fixed in 2.24.0
- Fix · GHSA-hq76-6gh2-5g4q github.com/edgelesssys/constellation/v2 (Go) Fixed in 2.24.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-58356
- 2026-10-03 Alias added: GHSA-hq76-6gh2-5g4q
References
Other 6
- https://github.com/edgelesssys/constellation/security/advisories/GHSA-hq76-6gh2-5g4q
- https://github.com/edgelesssys/constellation/pull/3927
- https://github.com/edgelesssys/constellation/releases/tag/v2.24.0
- https://github.com/edgelesssys/constellation/commit/bb8d2c8a5c0a0a6510d2cc43055be21f4a3ab83c
- https://blog.trailofbits.com/2025/10/30/vulnerabilities-in-luks2-disk-encryption-for-confidential-vms
- https://github.com/edgelesssys/constellation
More edgelesssys vulnerabilities
- TI-2026-64974 Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer CVSS 4.0MEDIUM 5.3
- TI-2026-64973 Contrast before 1.16.0 Remote Attestation Relay Attack CVSS 4.0CRITICAL 9.1
- TI-2026-64976 Contrast before 1.19.1 CopyFile Policy Symlink Subversion CVSS 4.0HIGH 8.6
- TI-2026-64971 Contrast before 1.23.1 Image Substitution via Policy Generation CVSS 4.0HIGH 8.6
- TI-2026-71174 Contrast world-writable containerd config allows privilege escalation CVSS 4.0HIGH 8.5
- TI-2025-43536 Contrast before 1.8.1 Information Disclosure via Logging CVSS 4.0HIGH 8.5
Sources
- CVE-2025-58356 · CVE Program
- CVE-2025-58356 · NVD
- FIRST EPSS
- GHSA-hq76-6gh2-5g4q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences