Vulnerability Description
Missing cryptographic step in Caliptra Core Firmware (aes_256_gcm_update module) results in an incorrect GCM authentication tag. When the streaming AES-256-GCM API is used with empty AAD, the hardware GHASH accumulator state is not saved after the first update call, causing the final tag to exclude the first batch of processed ciphertext. Ciphertext produced by that call may be modified without the tag reflecting the change. This issue affects Core Runtime Firmware: from 2.0.0 through 2.0.1, 2.1.0.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-6458?
CVE-2026-6458 is a documented vulnerability. Missing cryptographic step in Caliptra Core Firmware (aes_256_gcm_update module) results in an incorrect GCM authentication tag. When the streaming AES-256-GCM API is used with empty AAD, the hardware...
How severe is CVE-2026-6458?
CVSS scoring is not yet available for CVE-2026-6458. Check NVD for updates.
Is there a patch for CVE-2026-6458?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.