CVE-2026-7328: CWE-862 Missing Authorization in Caliptra Core Runtime Firmware
CVE-2026-7328 is a missing authorization vulnerability in Caliptra Core Runtime Firmware version 2.1.0. It affects certain mailbox commands that handle unverified AXI addresses, allowing a privileged local attacker to cause a denial of service. The broader security impact depends on specific integration contexts. The vulnerability has a medium severity with a CVSS score of 6.8.
AI Analysis
Technical Summary
This vulnerability in Caliptra Core Runtime Firmware 2.1.0 involves missing authorization checks in the handling of mailbox commands INVOKE_DPE_MLDSA87, CM_AES_GCM_DECRYPT_DMA, and EXTERNAL_MAILBOX_CMD in subsystem mode. A privileged local attacker can exploit this by sending mailbox commands with unverified AXI addresses, resulting in denial of service. The impact beyond availability is dependent on how the firmware is integrated into the overall system. No official remediation or patch has been indicated in the available data.
Potential Impact
The primary impact is denial of service caused by processing mailbox commands with unverified AXI addresses. There is no confirmed impact on confidentiality or integrity, and broader effects depend on the specific integration environment of the firmware. The vulnerability requires local privileged access to exploit.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, limit local privileged access to trusted users and monitor for unusual mailbox command activity if possible. No vendor-provided mitigation or temporary fix is currently documented.
CVE-2026-7328: CWE-862 Missing Authorization in Caliptra Core Runtime Firmware
Description
CVE-2026-7328 is a missing authorization vulnerability in Caliptra Core Runtime Firmware version 2.1.0. It affects certain mailbox commands that handle unverified AXI addresses, allowing a privileged local attacker to cause a denial of service. The broader security impact depends on specific integration contexts. The vulnerability has a medium severity with a CVSS score of 6.8.
CVSS v4.0
Score 6.8medium
Affected software
pkg:github/Core Runtime FirmwareRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Caliptra Core Runtime Firmware 2.1.0 involves missing authorization checks in the handling of mailbox commands INVOKE_DPE_MLDSA87, CM_AES_GCM_DECRYPT_DMA, and EXTERNAL_MAILBOX_CMD in subsystem mode. A privileged local attacker can exploit this by sending mailbox commands with unverified AXI addresses, resulting in denial of service. The impact beyond availability is dependent on how the firmware is integrated into the overall system. No official remediation or patch has been indicated in the available data.
Potential Impact
The primary impact is denial of service caused by processing mailbox commands with unverified AXI addresses. There is no confirmed impact on confidentiality or integrity, and broader effects depend on the specific integration environment of the firmware. The vulnerability requires local privileged access to exploit.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, limit local privileged access to trusted users and monitor for unusual mailbox command activity if possible. No vendor-provided mitigation or temporary fix is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Caliptra
- Date Reserved
- 2026-04-28T16:55:51.837Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a60f1d29c2644c7f85877af
Added to database: 07/22/2026, 16:37:38 UTC
Last enriched: 07/22/2026, 16:53:03 UTC
Last updated: 07/22/2026, 17:28:17 UTC
Views: 4
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