{"id":"CVE-2025-62799","summary":"FastDDS's heap buffer overflow in RTPS DATA_FRAG enables unauthenticated DoS (potential RCE)","details":"Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group\n). 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\nauthenticated sender can transmit a single malformed RTPS DATA_FRAG packet where `fragmentSize` and `sampleSize` are craft\ned to violate internal assumptions. Due to a 4-byte alignment step during fragment metadata initialization, the code write\ns past the end of the allocated payload buffer, causing immediate crash (DoS) and potentially enabling memory corruption (\nRCE risk). 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