Unverified AXI Address in Subsystem Mode Commands Enables Denial of Service
Priority LOW 29CWE-862Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0013 2nd percentileScored 2026-11-07
Fix Fixed Core Runtime Firmware (Caliptra): 2.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Core Runtime Firmware (Caliptra) Fixed in 2.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-7328
References
More Caliptra vulnerabilities
- TI-2026-05099 MCU Firmware Update Authentication Bypass on Caliptra Core CVSS 4.0HIGH 7.2
- TI-2026-10213 Caliptra Update-Reset Secure-Boot Bypass via Attacker-Chosen AXI Staging Address (TOCTOU) CVSS 4.0MEDIUM 5.6
- TI-2026-05666 AES-256-GCM Authentication Tag Does Not Cover First Ciphertext Blocks When AAD Is Empty CVSS 4.0MEDIUM 5.1
- TI-2026-10214 Production Debug-Unlock Token Verification Missing Device Binding CVSS 4.0LOW 1.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences