Medium severity · published Jul 25, 2025
CVE-2025-2329
High traffic causes corrupt SPI packets in OpenThread leading to denial of service
5.3
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenThread · silabs.com
2.5.0 through 2.5.2; 2.6.0 through 2.6.2; through 2.4.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-2329
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-2329
community.silabs.com
https://community.silabs.com/069Vm00000SNyueIAD
github.com
https://github.com/SiliconLabs/gecko_sdk/releases
github.com
https://github.com/SiliconLabs/simplicity_sdk/releases