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

Quick assessment

Affected
silabs.com OpenThread
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Silicon Labs OpenThread RCP是美国Silicon Labs公司的一个协处理器的固件。 Silicon Labs OpenThread RCP存在安全漏洞，该漏洞源于在高流量环境中未能清除SPI传输缓冲区，可能导致发送损坏的数据包，导致主机重置RCP，造成拒绝服务。

AI Predicted 5.3 Difficulty: Hard EPSS 0.21% · P12

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-2329

Vulnerability Information
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Vulnerability Title
High traffic causes corrupt SPI packets in OpenThread leading to denial of service
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5
Vulnerability Title
Silicon Labs OpenThread RCP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Silicon Labs OpenThread RCP是美国Silicon Labs公司的一个协处理器的固件。 Silicon Labs OpenThread RCP存在安全漏洞，该漏洞源于在高流量环境中未能清除SPI传输缓冲区，可能导致发送损坏的数据包，导致主机重置RCP，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
silabs.com OpenThread 2.5.0 ~ 2.5.2 -

II. Public POCs for CVE-2025-2329

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III. Intelligence Information for CVE-2025-2329

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Vendor Pages for CVE-2025-2329 (1)

IV. Related Vulnerabilities

Same product: OpenThread
Same vendor: silabs.com
Same weakness: CWE-908

V. Comments for CVE-2025-2329

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