CVE-2026-7328

Device hang via unverified DMA addresses

Published Jul 22, 2026 · Updated Jul 22, 2026

Missing authorization in Caliptra Core Runtime Firmware 2.1.0 allows local users to hang the device through crafted mailbox commands. Subsystem-mode handlers for INVOKE_DPE_MLDSA87, CM_AES_GCM_DECRYPT_DMA, and EXTERNAL_MAILBOX_CMD accept caller-supplied AXI addresses without validation before DMA reads or writes. Privileged access to the local mailbox and subsystem mode is required; invalid addresses hang Caliptra, while other effects depend on integration-specific AXI reachability.

CVSS severity6.8
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Caliptra Core Runtime Firmware 2.1.0 allows local users to hang the device through crafted mailbox commands. Subsystem-mode handlers for INVOKE_DPE_MLDSA87, CM_AES_GCM_DECRYPT_DMA, and EXTERNAL_MAILBOX_CMD accept caller-supplied AXI addresses without validation before DMA reads or writes. Privileged access to the local mailbox and subsystem mode is required; invalid addresses hang Caliptra, while other effects depend on integration-specific AXI reachability.

The record

CVE
CVE-2026-7328
Published
Jul 22, 2026
Updated
Jul 22, 2026
Vendor
Caliptra
Product
Caliptra Runtime Firmware
Classifications
CWE-862, CAPEC-122, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Caliptra · Caliptra Runtime Firmwareversion=2.1.0

Published CVSS scores

6.8CaliptraCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CAPEC-122Privilege Abuse
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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