What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-10-24
• Weakness: CWE-336

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

• Silicon Labs Matter Github: 0

References

• https://github.com/SiliconLabs/matter/tree/release_2.3.1-1.3
• https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm0000009SzZIAU?operationContext=S1

Get alerted when CVE-2026-6924 or the next vulnerability affects your stack