Out-of-bounds Write Affecting FreeRTOS/FreeRTOS-Plus-TCP package, versions [2.3.4,4.3.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-FREERTOSFREERTOSPLUSTCP-10381474
- published18 Jun 2025
- disclosed4 Jun 2025
- creditUnknown
Introduced: 4 Jun 2025
NewCVE-2025-5688 (opens in a new tab)How to fix?
Upgrade FreeRTOS/FreeRTOS-Plus-TCP to version 4.3.2 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write due to the handling of LLMNR or mDNS queries with excessively long DNS names. An attacker can write data outside of the intended buffer boundaries by sending specially crafted network packets. This is only exploitable if Buffer Allocation Scheme 1 is used with LLMNR or mDNS enabled.
Note: If LLMNR is used with Buffer Allocation Scheme 1, the vulnerability affected versions v2.3.4 through v4.3.1. If mDNS is used with Buffer Allocation Scheme 1, the vulnerability affected versions v4.0.0 through v4.3.1.