CVE-2023-39946: Debian Linux

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.11.1, 2.10.2, 2.9.2, and 2.6.6, heap can be overflowed by providing a PID_PROPERTY_LIST parameter that contains a CDR string with length larger than the size of actual content. In `eprosima::fastdds::dds::ParameterPropertyList_t::push_back_helper`, `memcpy` is called to first copy the octet'ized length and then to copy the data into `properties_.data`. At the second memcpy, both `data` and `size` can be controlled by anyone that sends the CDR string to the discovery multicast port. This can remotely crash any Fast-DDS process. Versions 2.11.1, 2.10.2, 2.9.2, and 2.6.6 contain a patch for this issue.

Affected products

• Debian Debian Linux: version 11.0 only; version 12.0 only
• Eprosima Fast Dds: from 2.6.0, before 2.6.6 (fixed in 2.6.6); from 2.9.0, before 2.9.2 (fixed in 2.9.2); from 2.10.0, before 2.10.2 (fixed in 2.10.2); version 2.11.0 only

Published 2023-08-11. Last modified 2026-06-17.