Caliptra Core Runtime up to 2.0.1/2.1.0 activate_fw function return value

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k1.65

Summaryinfo

A vulnerability classified as critical was found in Caliptra Core Runtime up to 2.0.1/2.1.0. Impacted is the function ActivateFirmwareCmd::activate_fw. Executing a manipulation can lead to function return value. The identification of this vulnerability is CVE-2026-5818. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Caliptra Core Runtime up to 2.0.1/2.1.0. This vulnerability affects the function ActivateFirmwareCmd::activate_fw. The manipulation with an unknown input leads to a function return value vulnerability. The CWE definition for the vulnerability is CWE-253. The product incorrectly checks a return value from a function, which prevents it from detecting errors or exceptional conditions. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared with NVIDIA Offensive Security Research as GHSA-456r-gcjr-6rxq. The advisory is available at github.com. This vulnerability was named CVE-2026-5818 since 04/08/2026. The exploitation appears to be difficult. The attack can be initiated remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 2.0.2 or 2.1.1 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.6
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Function return value
CWE: CWE-253
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Core Runtime 2.0.2/2.1.1

Timelineinfo

04/08/2026 CVE reserved
06/24/2026 +77 days Advisory disclosed
06/24/2026 +0 days VulDB entry created
06/24/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-456r-gcjr-6rxq
Organization: NVIDIA Offensive Security Research
Status: Confirmed

CVE: CVE-2026-5818 (🔒)
GCVE (CVE): GCVE-0-2026-5818
GCVE (VulDB): GCVE-100-373114

Entryinfo

Created: 06/24/2026 07:36
Changes: 06/24/2026 07:36 (68)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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