CVE-2025-64438
Severity CVSS v4.0:
LOW
Type:
Unavailable / Other
Publication date:
03/02/2026
Last modified:
03/02/2026
Description
Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group<br />
). 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<br />
-DDS when processing RTPS GAP submessages under RELIABLE QoS. By sending a tiny GAP packet with a huge gap range (`gapList<br />
.base - gapStart`), an attacker drives `StatefulReader::processGapMsg()` into an unbounded loop that inserts millions of s<br />
equence numbers into `WriterProxy::changes_received_` (`std::set`), causing multi-GB heap growth and process termination. <br />
No authentication is required beyond network reachability to the reader on the DDS domain. In environments without an RSS <br />
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<br />
he issue.
References to Advisories, Solutions, and Tools
- 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