{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6924", "assignerOrgId": "030b2754-1501-44a4-bef8-48be86a33bf4", "state": "PUBLISHED", "assignerShortName": "Silabs", "dateReserved": "2026-04-23T17:11:02.116Z", "datePublished": "2026-07-23T21:05:22.113Z", "dateUpdated": "2026-07-23T21:05:22.113Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "030b2754-1501-44a4-bef8-48be86a33bf4", "shortName": "Silabs", "dateUpdated": "2026-07-23T21:05:22.113Z"}, "title": "Weak entropy initialization in Silicon Labs Matter SiWx917 TinyCrypt path", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-336", "description": "CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG)", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-97", "descriptions": [{"lang": "en", "value": "CAPEC-97: Cryptanalysis"}]}], "affected": [{"vendor": "Silicon Labs", "product": "Silicon Labs Matter Github", "repo": "https://github.com/SiliconLabs/simplicity_sdk", "versions": [{"status": "affected", "version": "0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "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."}]}], "references": [{"url": "https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm0000009SzZIAU?operationContext=S1", "tags": ["vendor-advisory", "permissions-required"]}, {"url": "https://github.com/SiliconLabs/matter/tree/release_2.3.1-1.3", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Junming C. (@Chapoly1305) and Prof. Qiang Zeng of George Mason University", "type": "reporter"}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

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