How severe is CVE-2025-58356?

CVE-2025-58356 has a CVSS 4.0 base score of 8.3, rated high severity.

Is CVE-2025-58356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-58356?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-58356 have an EU (EUVD) identifier?

Yes. CVE-2025-58356 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36204.

When was CVE-2025-58356 published?

CVE-2025-58356 was published on 2025-10-27 and last updated on 2026-06-17.

CVE-2025-58356

CVE-2025-58356 is a high-severity vulnerability with a CVSS 4.0 base score of 8.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: High (CVSS 4.0 base score 8.3)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36204
Weakness: CWE-347
Published: 2025-10-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-58356?: 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.
How severe is CVE-2025-58356?: CVE-2025-58356 has a CVSS 4.0 base score of 8.3, rated high severity.
Is CVE-2025-58356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-58356?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-58356 have an EU (EUVD) identifier?: Yes. CVE-2025-58356 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36204.
When was CVE-2025-58356 published?: CVE-2025-58356 was published on 2025-10-27 and last updated on 2026-06-17.

References

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