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4 vulnerabilities found for Core ROM by Caliptra
CVE-2026-11836 (GCVE-0-2026-11836)
Vulnerability from nvd – Published: 2026-08-04 00:02 – Updated: 2026-08-04 21:25 X_Open Source
VLAI
EPSS
VEX
Title
Production Debug-Unlock Token Verification Missing Device Binding
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 19:24 UTC
CWE
- CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Caliptra | Core ROM |
Affected:
2.0.0 , ≤ 2.0.2
(semver)
Unaffected: 2.0.3 (semver) Affected: 2.1.0 , ≤ 2.1.1 (semver) Unaffected: 2.1.2 (semver) |
|
| Caliptra | Core Firmware |
Affected:
2.0.0 , ≤ 2.0.1
(semver)
Unaffected: 2.0.2 (semver) Affected: 2.1.0 (semver) Unaffected: 2.1.1 (semver) |
Date Public
2026-08-03 00:00
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CVE-2026-11835 (GCVE-0-2026-11835)
Vulnerability from nvd – Published: 2026-08-04 00:03 – Updated: 2026-08-04 21:25 X_Open Source
VLAI
EPSS
VEX
Title
Caliptra Update-Reset Secure-Boot Bypass via Attacker-Chosen AXI Staging Address (TOCTOU)
Summary
Time-of-check time-of-use (TOCTOU) vulnerability combined with missing input validation in Caliptra Core ROM (UpdateResetFlow::run()) in subsystem mode allows a compromised local attacker to silently bypass secure boot by supplying an AXI staging address that is not validated against the strap-configured SS_EXTERNAL_STAGING_AREA_BASE_ADDR, enabling firmware to be modified between verification and loading into ICCM. Attestation continues to report the originally verified image digest, masking the compromise. Exploitation requires a compromised MCU firmware with AXI manager access to unprotected SRAM reachable by Caliptra.
This issue affects Core ROM: 2.1.0 through 2.1.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 19:21 UTC
Assigner
References
1 reference
Impacted products
Date Public
2026-08-03 00:00
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CVE-2026-11835 (GCVE-0-2026-11835)
Vulnerability from cvelistv5 – Published: 2026-08-04 00:03 – Updated: 2026-08-04 21:25 X_Open Source
VLAI
EPSS
VEX
Title
Caliptra Update-Reset Secure-Boot Bypass via Attacker-Chosen AXI Staging Address (TOCTOU)
Summary
Time-of-check time-of-use (TOCTOU) vulnerability combined with missing input validation in Caliptra Core ROM (UpdateResetFlow::run()) in subsystem mode allows a compromised local attacker to silently bypass secure boot by supplying an AXI staging address that is not validated against the strap-configured SS_EXTERNAL_STAGING_AREA_BASE_ADDR, enabling firmware to be modified between verification and loading into ICCM. Attestation continues to report the originally verified image digest, masking the compromise. Exploitation requires a compromised MCU firmware with AXI manager access to unprotected SRAM reachable by Caliptra.
This issue affects Core ROM: 2.1.0 through 2.1.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 19:21 UTC
Assigner
References
1 reference
Impacted products
Date Public
2026-08-03 00:00
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CVE-2026-11836 (GCVE-0-2026-11836)
Vulnerability from cvelistv5 – Published: 2026-08-04 00:02 – Updated: 2026-08-04 21:25 X_Open Source
VLAI
EPSS
VEX
Title
Production Debug-Unlock Token Verification Missing Device Binding
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 19:24 UTC
CWE
- CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Caliptra | Core ROM |
Affected:
2.0.0 , ≤ 2.0.2
(semver)
Unaffected: 2.0.3 (semver) Affected: 2.1.0 , ≤ 2.1.1 (semver) Unaffected: 2.1.2 (semver) |
|
| Caliptra | Core Firmware |
Affected:
2.0.0 , ≤ 2.0.1
(semver)
Unaffected: 2.0.2 (semver) Affected: 2.1.0 (semver) Unaffected: 2.1.1 (semver) |
Date Public
2026-08-03 00:00
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"id": "CVE-2026-11836",
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"Technical Impact": "partial"
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"timestamp": "2026-08-04T19:24:52.944825Z",
"version": "2.0.3"
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"collectionURL": "https://github.com/chipsalliance/caliptra-sw",
"defaultStatus": "unaffected",
"modules": [
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"packageName": "Core ROM",
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"lessThanOrEqual": "2.0.2",
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"references": [
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"url": "https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-hw68-jjx4-m376"
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"source": {
"discovery": "INTERNAL"
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"tags": [
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"title": "Production Debug-Unlock Token Verification Missing Device Binding",
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"datePublished": "2026-08-04T00:02:34.093Z",
"dateReserved": "2026-06-09T23:30:40.399Z",
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