CVE-2026-6458

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-834g-h5x6-2hqr

Configurations

No configuration.

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Un paso criptográfico faltante en el firmware Caliptra Core (módulo aes_256_gcm_update) resulta en una etiqueta de autenticación GCM incorrecta. Cuando se utiliza la API de streaming AES-256-GCM con AAD vacío, el estado del acumulador GHASH del hardware no se guarda después de la primera llamada de actualización, lo que hace que la etiqueta final excluya el primer lote de texto cifrado procesado. El texto cifrado producido por esa llamada puede ser modificado sin que la etiqueta refleje el cambio. Este problema afecta al firmware Core Runtime: desde 2.0.0 hasta 2.0.1, 2.1.0.

Information

Published : 2026-06-24 00:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-6458

Mitre link : CVE-2026-6458

CVE.ORG link : CVE-2026-6458

JSON object : View

Products Affected

No product.

CWE

CWE-325

Missing Cryptographic Step

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