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.
Published: 2026-07-23
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title Weak entropy initialization in Silicon Labs Matter SiWx917 TinyCrypt path
Weaknesses CWE-336
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

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cve-icon MITRE

Status: PUBLISHED

Assigner: Silabs

Published:

Updated: 2026-07-23T21:05:22.113Z

Reserved: 2026-04-23T17:11:02.116Z

Link: CVE-2026-6924

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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Weaknesses