{"id":"UBUNTU-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":"2026-05-20T16:23:40.244632113Z","published":"2026-02-03T20:15:00Z","upstream":["CVE-2025-64438"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-64438"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-64438"},{"type":"REPORT","url":"https://github.com/eProsima/Fast-DDS/commit/0b0cb308eaeeb2175694aa0a0a723106824ce9a7"}],"affected":[{"package":{"name":"fastdds","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/fastdds?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.0+ds-9","2.4.1+ds-1","2.5.0+ds-3","2.5.0+ds-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"fastdds-tools","binary_version":"2.5.0+ds-3ubuntu0.1~esm1"},{"binary_name":"libfastrtps2.5","binary_version":"2.5.0+ds-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"}},{"package":{"name":"fastdds","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/fastdds?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.1+ds-3","2.11.2+ds-6","2.11.2+ds-6ubuntu1","2.11.2+ds-6.1build2","2.11.2+ds-6.1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"fastdds-tools","binary_version":"2.11.2+ds-6.1build3"},{"binary_version":"2.11.2+ds-6.1build3","binary_name":"libfastrtps2.11t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"}},{"package":{"name":"fastdds","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/fastdds?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+ds-1","3.1.2+ds-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"fastdds-tools","binary_version":"3.1.2+ds-1build1"},{"binary_version":"3.1.2+ds-1build1","binary_name":"libfastdds3.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"}},{"package":{"name":"fastdds","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/fastdds?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+ds-1build1","3.3.0+ds-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"fastdds-tools","binary_version":"3.3.0+ds-3ubuntu1"},{"binary_name":"libfastdds3.3","binary_version":"3.3.0+ds-3ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}