What’s Vulnerable › Vulnerabilities

CVE-2025-2838: Silicon Labs Gecko OS DNS Response Processing Infinite Loop Denial-of-Service Vulnerability

• Severity: medium (CVSS 6.5 v3.0)
• 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: 2025-03-26 · updated 2026-06-17
• Weakness: CWE-835

Description

Silicon Labs Gecko OS DNS Response Processing Infinite Loop Denial-of-Service Vulnerability. This vulnerability allows network-adjacent attackers to create a denial-of-service condition on affected installations of Silicon Labs Gecko OS. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of DNS responses. The issue results from a logic error that can lead to an infinite loop. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-23392.

Affected products

• Silicon Labs Gecko OS: 1.0.46

References

• https://community.silabs.com/a45Vm0000000Atp
• https://www.zerodayinitiative.com/advisories/ZDI-24-872/

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