{"id":"DEBIAN-CVE-2025-64438","details":"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.","modified":"2026-09-01T20:05:55.658792525Z","published":"2026-02-03T20:15:57.280Z","upstream":["CVE-2025-64438"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-64438"}],"affected":[{"package":{"name":"fastdds","ecosystem":"Debian:12","purl":"pkg:deb/debian/fastdds?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.1+ds-1","2.10.1+ds-2","2.10.1+ds-3","2.11.2+ds-1","2.11.2+ds-2","2.11.2+ds-3","2.11.2+ds-4","2.11.2+ds-5","2.11.2+ds-6","2.11.2+ds-6.1","2.11.2+ds-6.1~exp1","2.14.0+ds-1","2.14.0+ds-2","2.14.0+ds-3","2.14.0+ds-4","2.14.1+ds-1","2.14.2+ds-1","2.14.3+ds-1","2.9.1+ds-1","2.9.1+ds-1+deb12u1","2.9.1+ds-1+deb12u2","3.0.0+ds-1","3.0.0+ds-2","3.0.0+ds-3","3.0.1+ds-1","3.1.0+ds-1","3.1.0+ds-2","3.1.2+ds-1","3.3.0+ds-1","3.3.0+ds-2","3.3.0+ds-3","3.6.1+ds-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-64438.json"}},{"package":{"name":"fastdds","ecosystem":"Debian:13","purl":"pkg:deb/debian/fastdds?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+ds-1","3.3.0+ds-1","3.3.0+ds-2","3.3.0+ds-3","3.6.1+ds-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-64438.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}