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CVE-2026-7328

Unverified AXI Address in Subsystem Mode Commands Enables Denial of Service

MEDIUM
6.8
CVSS Score
Published: July 22, 2026 at 04:17 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorCore Runtime Firmware

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Core Runtime Firmware· Caliptra
90%
2.1.0
Vendor states this is fixed in 2.1.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-c5v4-q445-wv84

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMCaliptra
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-862

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