What’s Vulnerable › Vulnerabilities

CVE-2025-2329: High traffic causes corrupt SPI packets in OpenThread leading to denial of service

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-25 · updated 2026-06-17
• Weakness: CWE-908

Description

In high traffic environments, a Silicon Labs OpenThread RCP (see impacted versions) fails to clear the SPI transmit buffer and may send a corrupt packet over SPI to its host,  causing the host to reset the RCP which results in a denial of service.

Affected products

• silabs.com OpenThread: from 2.5.0 through 2.5.2; from 2.6.0 through 2.6.2; through 2.4.6

References

• https://community.silabs.com/069Vm00000SNyueIAD
• https://github.com/SiliconLabs/gecko_sdk/releases
• https://github.com/SiliconLabs/simplicity_sdk/releases

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