Is CVE-2026-7328 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7328 being exploited in the wild.

How severe is CVE-2026-7328?

Informational severity, with a CVSS score of 6.8, published 22 July 2026.

Which products and versions are affected?

CHIPS Alliance Core Runtime Firmware 2.1.0.

Is there a fix for CVE-2026-7328?

A patch was published on 2026-07-22: Fixed in version 2.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-7328 attacked?

It is attacked with local access, in device firmware.

Am I affected by CVE-2026-7328?

Check whether you run CHIPS Alliance Core Runtime Firmware at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7328: Caliptra Core Runtime Firmware missing authorization in mailbox commands

CVE-2026-7328 · Severity: info · CVSS 6.8 · Published 2026-07-22

Caliptra Core Runtime Firmware is used to provide a secure foundation for hardware systems. A security flaw in how the firmware handles certain commands allows a local user with basic privileges to crash the system or cause it to stop responding. This could lead to a total service outage or require a manual reset of the affected hardware.

Technologies: CHIPS Alliance Core Runtime Firmware. Vendors: CHIPS Alliance.

Quick answers

Is CVE-2026-7328 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7328 being exploited in the wild.
How severe is CVE-2026-7328?: Informational severity, with a CVSS score of 6.8, published 22 July 2026.
Which products and versions are affected?: CHIPS Alliance Core Runtime Firmware 2.1.0.
Is there a fix for CVE-2026-7328?: A patch was published on 2026-07-22: Fixed in version 2.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-7328 attacked?: It is attacked with local access, in device firmware.
Am I affected by CVE-2026-7328?: Check whether you run CHIPS Alliance Core Runtime Firmware at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A missing authorization vulnerability exists in Caliptra Core Runtime Firmware version 2.1.0 when operating in subsystem mode. The affected commands—INVOKE_DPE_MLDSA87, CM_AES_GCM_DECRYPT_DMA, and EXTERNAL_MAILBOX_CMD—perform DMA reads or writes using unverified AXI addresses provided within the command. A local attacker with low privileges can exploit this by providing an invalid or unauthorized AXI address, causing the system to attempt an invalid DMA access. This typically results in a system hang (Denial of Service), though further impacts to system integrity may occur depending on the specific hardware integration. The issue is addressed in version 2.1.1.

Affected products

Caliptra Core Runtime Firmware 2.1.0

Timeline

2026-07-22: advisory
2026-07-22: disclosed
2026-07-22: patched: Fixed in version 2.1.1

References

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