CVE-2025-64438
Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group
). Prior to versions 3.4.1, 3.3.1, and 2.6.11, a remotely triggerable Out-of-Memory (OOM) denial-of-service exists in Fast
-DDS when processing RTPS GAP submessages under RELIABLE QoS. By sending a tiny GAP packet with a huge gap range (gapList .base - gapStart), an attacker drives StatefulReader::processGapMsg() into an unbounded loop that inserts millions of s
equence numbers into WriterProxy::changes_received_ (std::set), causing multi-GB heap growth and process termination.
No authentication is required beyond network reachability to the reader on the DDS domain. In environments without an RSS
limit (non-ASan / unlimited), memory consumption was observed to rise to ~64 GB. Versions 3.4.1, 3.3.1, and 2.6.11 patch t
he issue.
| Software | From | Fixed in |
|---|---|---|
| eprosima / fast_dds | - | 2.6.11 |
| eprosima / fast_dds | 3.0.0 | 3.3.1 |
| eprosima / fast_dds | 3.4.0 | 3.4.0.x |
- https://github.com/eProsima/Fast-DDS/commit/0b0cb308eaeeb2175694aa0a0a723106824ce9a7
- https://github.com/eProsima/Fast-DDS/commit/71da01b4aea4d937558984f2cf0089f5ba3c871f
- https://github.com/eProsima/Fast-DDS/commit/8ca016134dac20b6e30e42b7b73466ef7cdbc213
- https://security-tracker.debian.org/tracker/CVE-2025-64438
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