CVE-2026-6924

Weak entropy initialization in Silicon Labs Matter SiWx917 TinyCrypt path

Published Jul 23, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Silicon Labs
Silicon Labs silicon Labs Matter Github
Vendors & Products Silicon Labs
Silicon Labs silicon Labs Matter Github
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Silabs
Published
Updated
Jul 24, 2026, 1:40 PM
Reserved
Apr 23, 2026, 5:11 PM
Status
Awaiting Analysis
Published
Jul 23, 2026, 9:17 PM
Modified
Oct 24, 2026, 1:10 PM