CVE-2025-5688Out of Bounds Write in FreeRTOS-Plus-TCP

Description

We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled. Users should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://aws.amazon.com/security/security-bulletins/AWS-2025-012/ vendor-advisory
• https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.2 patch
• https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-5x4f-fvv8-wr65 vendor-advisory