CVE-2025-62799: Debian Linux

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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 heap buffer overflow exists in the Fast-DDS DATA_FRAG receive path. An un authenticated sender can transmit a single malformed RTPS DATA_FRAG packet where `fragmentSize` and `sampleSize` are craft ed to violate internal assumptions. Due to a 4-byte alignment step during fragment metadata initialization, the code write s past the end of the allocated payload buffer, causing immediate crash (DoS) and potentially enabling memory corruption ( RCE risk). Versions 3.4.1, 3.3.1, and 2.6.11 patch the issue.

Affected products

• Debian Debian Linux: version 11.0 only; version 12.0 only; version 13.0 only
• Eprosima Fast Dds: before 2.6.11 (fixed in 2.6.11); from 3.0.0, before 3.3.1 (fixed in 3.3.1); version 3.4.0 only

Published 2026-02-03. Last modified 2026-06-17.