CVE-2026-7328: Caliptra Core Runtime Firmware

Medium severity, CVSS 6.8. EPSS: 0.1% chance of exploitation in the next 30 days.

Missing authorization in Caliptra Core Runtime Firmware (INVOKE_DPE_MLDSA87, CM_AES_GCM_DECRYPT_DMA, EXTERNAL_MAILBOX_CMD commands) in subsystem mode allows a privileged local attacker to cause a denial of service via mailbox commands containing unverified AXI addresses. The security impact beyond availability is integration-specific. This issue affects Core Runtime Firmware: 2.1.0.

Affected products

• Caliptra Core Runtime Firmware: version 2.1.0 only

Published 2026-07-22. Last modified 2026-07-22.