CVE-2026-22590: Eprosima Fast-Dds

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). Versions prior to 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 have a remotely triggerable Out-of-Bounds Read while processing RTPS `DATA_FRAG` submessages. An attacker can craft a `DATA_FRAG` with a large `sampleSize` but a small actual payload, and set `fragmentsInSubmessage` such that the receiver treats the packet as the LAST fragment**. In this LAST-fragment path, Fast-DDS computes `incoming_length` based on `sampleSize` and calls `memcpy()` without validating `incoming_data.length >= incoming_length`. As a result, `CacheChange_t::add_fragments()` reads past the received UDP datagram buffer and into adjacent heap memory, copying those bytes into the reassembly buffer. In a Discovery Server deployment, the resulting `CacheChange_t` can be relayed to other participants, meaning that a newly joining participant may receive leaked heap memory (e.g., pointer values that could aid ASLR bypass). Versions 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 fix the issue.

Affected products

• Eprosima Fast-Dds: before 2.6.12 (fixed in 2.6.12); from 2.7.0, before 2.14.6 (fixed in 2.14.6); from 3.0.0, before 3.2.4 (fixed in 3.2.4); from 3.3.0, before 3.3.1 (fixed in 3.3.1); from 3.4.0, before 3.4.2 (fixed in 3.4.2)

Published 2026-09-09. Last modified 2026-09-09.