Insyde InsydeH2O SMM EFI_BOOT_SERVICES memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Insyde InsydeH2O. It has been classified as critical. The impacted element is an unknown function of the component SMM. The manipulation of the argument EFI_BOOT_SERVICES leads to memory corruption. This vulnerability is referenced as CVE-2021-41840. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Insyde InsydeH2O (unknown version) and classified as critical. This issue affects an unknown code block of the component SMM. The manipulation of the argument EFI_BOOT_SERVICES with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in NvmExpressDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of Inclusion of Functionality from an Untrusted Control Sphere.

The weakness was published 02/03/2022. It is possible to read the advisory at insyde.com. The identification of this vulnerability is CVE-2021-41840 since 10/01/2021. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/01/2021 🔍
02/03/2022 +125 days 🔍
02/03/2022 +0 days 🔍
11/04/2025 +1370 days 🔍

Sourcesinfo

Advisory: insyde.com
Status: Confirmed

CVE: CVE-2021-41840 (🔍)
GCVE (CVE): GCVE-0-2021-41840
GCVE (VulDB): GCVE-100-192155

Entryinfo

Created: 02/03/2022 08:16
Updated: 11/04/2025 23:16
Changes: 02/03/2022 08:16 (18), 02/03/2022 08:17 (20), 02/05/2022 07:17 (1), 11/04/2025 23:16 (34)
Complete: 🔍
Cache ID: 216:21A:103

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