Insyde H2O up to 5.7 on Lenovo EfiPcdProtocol out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Insyde H2O on Lenovo. It has been classified as critical. This issue affects some unknown processing of the component EfiPcdProtocol. The manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2025-4422. The attack must be carried out locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Insyde H2O on Lenovo. It has been rated as critical. This issue affects an unknown code block of the component EfiPcdProtocol. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The vulnerability was identified in the code developed specifically for Lenovo. Please visit "Lenovo Product Security Advisories and Announcements" webpage for more information about the vulnerability.  https://support.lenovo.com/us/en/product_security/home

The advisory is shared at insyde.com. The identification of this vulnerability is CVE-2025-4422 since 05/08/2025. The exploitation is known to be difficult. An attack has to be approached locally. Additional levels of successful authentication are necessary for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version L05.05.40.011803.172079 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.4
VulDB Temp Score: 6.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.2
CNA Vector (Insyde): 🔒

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

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: 🔒

Upgrade: H2O L05.05.40.011803.172079

Timelineinfo

05/08/2025 CVE reserved
07/30/2025 +83 days Advisory disclosed
07/30/2025 +0 days VulDB entry created
07/30/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: insyde.com
Status: Confirmed

CVE: CVE-2025-4422 (🔒)
GCVE (CVE): GCVE-0-2025-4422
GCVE (VulDB): GCVE-100-318113

Entryinfo

Created: 07/30/2025 08:15
Changes: 07/30/2025 08:15 (65)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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