CVE-2025-64438Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group ).
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-835
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
eprosima fast_dds eprosima:fast_dds | before 2.6.11; from 3.0.0 before 3.3.1; 3.4.0 | NVD |
References
- https://github.com/eProsima/Fast-DDS/commit/0b0cb308eaeeb2175694aa0a0a723106824ce9a7patch
- https://github.com/eProsima/Fast-DDS/commit/71da01b4aea4d937558984f2cf0089f5ba3c871fpatch
- https://github.com/eProsima/Fast-DDS/commit/8ca016134dac20b6e30e42b7b73466ef7cdbc213patch
- https://security-tracker.debian.org/tracker/CVE-2025-64438third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.