{"id":"UBUNTU-CVE-2026-22590","details":"eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). Versions prior to 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 have a remotely triggerable Out-of-Bounds Read while processing RTPS `DATA_FRAG` submessages. An attacker can craft a `DATA_FRAG` with a large `sampleSize` but a small actual payload, and set `fragmentsInSubmessage` such that the receiver treats the packet as the LAST fragment**. In this LAST-fragment path, Fast-DDS computes `incoming_length` based on `sampleSize` and calls `memcpy()` without validating `incoming_data.length \u003e= incoming_length`. As a result, `CacheChange_t::add_fragments()` reads past the received UDP datagram buffer and into adjacent heap memory, copying those bytes into the reassembly buffer. In a Discovery Server deployment, the resulting `CacheChange_t` can be relayed to other participants, meaning that a newly joining participant may receive leaked heap memory (e.g., pointer values that could aid ASLR bypass). Versions 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 fix the issue.","modified":"2026-09-16T14:01:50.732902399Z","published":"2026-09-09T16:17:00Z","upstream":["CVE-2026-22590"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-22590"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-22590"},{"type":"REPORT","url":"https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-7r7h-hwfj-q626"}],"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/2026/UBUNTU-CVE-2026-22590.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_version":"2.11.2+ds-6.1build3","binary_name":"fastdds-tools"},{"binary_name":"libfastrtps2.11t64","binary_version":"2.11.2+ds-6.1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22590.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/2026/UBUNTU-CVE-2026-22590.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:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}