Vulnerability · Published Jul 23, 2026 · Assigned by Silabs
CVE-2026-6924Weak entropy initialization in Silicon Labs Matter SiWx917 TinyCrypt path
High 8.7
In plain English
A high-severity security flaw in Silicon Labs Matter Github from Silicon Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.4%top 61.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Silicon Labs | Silicon Labs Matter Github | 0 |
Weakness: CWE-336 · 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