High 8.7Published Jul 23, 2026

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

Updated under an hour ago (Oct 26, 2026, 5:40 AM ET)

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It affects Silicon Labs Matter Github. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Silicon Labs Matter Github

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, 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
Weakness (CWE): CWE-336
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Silabs
NVD analysis: Awaiting Analysis
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Silicon Labs Silicon Labs Matter Github silicon_labs:matter_github (from the name)	0	CNA record

References

https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm0000009SzZIAU?operationContext=S1vendor-advisory, permissions-required
https://github.com/SiliconLabs/matter/tree/release_2.3.1-1.3patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.