Vulnerability Description
Insufficient verification of data authenticity in Caliptra Core ROM and Core Firmware (validate_debug_unlock_token()) in subsystem mode allows an attacker with access to the integrator's debug unlock signing service to unlock production debug on an unintended device by presenting a valid token issued for a different device sharing the same debug unlock key hash. The 384-bit challenge nonce continues to prevent replay of previously issued tokens. Practical impact is limited to loss of per-device scope enforcement within a set of devices that share the same unlock authority by design; it does not enable debug unlock on devices outside that set. This issue affects Core ROM: 2.0.0 through 2.0.2, 2.1.0 through 2.1.1; Core Firmware: 2.0.0 through 2.0.1, 2.1.0.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-11836?
CVE-2026-11836 is a documented vulnerability. Insufficient verification of data authenticity in Caliptra Core ROM and Core Firmware (validate_debug_unlock_token()) in subsystem mode allows an attacker with access to the integrator's debug unlock ...
How severe is CVE-2026-11836?
CVSS scoring is not yet available for CVE-2026-11836. Check NVD for updates.
Is there a patch for CVE-2026-11836?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.