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CVE-2026-6924— Weak entropy initialization in Silicon Labs Matter SiWx917 TinyCrypt path

Quick assessment

Affected
Silicon Labs Silicon Labs Matter Github
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Silicon Labs Matter是美国Silicon Labs公司开源的一款支持Matter协议的物联网开发平台。 Silicon Labs Matter存在加密问题漏洞，该漏洞源于熵初始化错误导致DRBG使用可预测的种子，使得Matter代码中生成的所有随机数使用相同的数字流。

CVSS 8.7 · High EPSS 0.45% · P36

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
Silicon Labs Silicon Labs Matter Github affected
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I. Basic Information for CVE-2026-6924

Vulnerability Information
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Vulnerability Title
Weak entropy initialization in Silicon Labs Matter SiWx917 TinyCrypt path
Source: CVE Program / CVE List V5
Vulnerability Description
A bug in the entropy initialization for SiWx917 causes the DRBG to use a predictable seed. As such, all random numbers generated in the Matter code use the same stream of numbers. This vulnerability was discovered after the impacted repository was already deprecated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
PRNG中使用相同种子
Source: CVE Program / CVE List V5
Vulnerability Title
Silicon Labs Matter 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Silicon Labs Matter是美国Silicon Labs公司开源的一款支持Matter协议的物联网开发平台。 Silicon Labs Matter存在加密问题漏洞，该漏洞源于熵初始化错误导致DRBG使用可预测的种子，使得Matter代码中生成的所有随机数使用相同的数字流。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Silicon Labs Silicon Labs Matter Github 0 -

II. Public POCs for CVE-2026-6924

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III. Intelligence Information for CVE-2026-6924

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Vendor Pages for CVE-2026-6924 (2)

IV. Related Vulnerabilities

Same vendor: Silicon Labs
Same weakness: CWE-336

V. Comments for CVE-2026-6924

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