CVE-2026-6924 | A bug in the entropy initialization for SiWx917 causes the D… | CVSS 8.7 HIGH

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.

Metadata

CVE ID: CVE-2026-6924
State: PUBLISHED
Assigner: Silabs
Reserved: 2026-04-23 17:11 UTC
Published: 2026-07-23 21:05 UTC
Last updated: 2026-07-23 21:05 UTC
Primary CWE: CWE-336
CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG)
Vendor / Product: Silicon Labs / Silicon Labs Matter Github
Sources: cve.org · NVD

Severity & Metrics

8.7 HIGH CVSS 4.0

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

Affected products (1)

Vendor	Product	Platform	Versions
Silicon Labs	Silicon Labs Matter Github	—	—

Weakness (CWE)

CWE	Source	Description
CWE-336	cna	CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG)

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	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

References (2)