Vulnerability DatabaseCVE-2026-5818
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CVE-2026-5818
Published:June 23, 2026
Updated:June 29, 2026
Incorrect check of function return value in Caliptra Core Runtime Firmware (ActivateFirmwareCmd::activate_fw modules) allows bypass of Caliptra Core's verification of the MCU FW during a hitless update. This issue affects Core Runtime Firmware: from 2.0.0 through 2.0.1, 2.1.0.
Affected Packages
https://github.com/chipsalliance/caliptra-sw.git (GITHUB):
Affected version(s) =fw-2.1.0 <fw-2.1.1
Fix Suggestion:
Update to version fw-2.1.1
https://github.com/chipsalliance/caliptra-sw.git (GITHUB):
Affected version(s) >=fw-2.0.0 <fw-2.0.2
Fix Suggestion:
Update to version fw-2.0.2
Related Resources (1)
https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-456r-gcjr-6rxq
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CVSS v4
Base Score:
7.2
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
8.1
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Incorrect Check of Function Return Value
CWE-253
EPSS
Base Score:
0.15