OpenDDS up to 3.33.x Rtps Udp Receive Strategy RtpsUdpReceiveStrategy.cpp handle_input null pointer dereference

Summaryinfo

A vulnerability was found in OpenDDS up to 3.33.x. It has been rated as problematic. Affected by this vulnerability is the function RtpsUdpReceiveStrategy::handle_input of the file dds/DCPS/transport/rtps_udp/RtpsUdpReceiveStrategy.cpp of the component Rtps Udp Receive Strategy. The manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2026-52836. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OpenDDS up to 3.33.x. It has been rated as problematic. This issue affects the function RtpsUdpReceiveStrategy::handle_input of the file dds/DCPS/transport/rtps_udp/RtpsUdpReceiveStrategy.cpp of the component Rtps Udp Receive Strategy. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

OpenDDS is an open source C++ implementation of the Object Management Group (OMG) Data Distribution Service (DDS). Prior to 3.34.0, a network attacker can crash a reachable OpenDDS participant by sending a malformed RTPS UDP submessage whose crafted length or sequence-number state causes dds/DCPS/transport/rtps_udp/RtpsUdpReceiveStrategy.cpp in RtpsUdpReceiveStrategy::handle_input() to advance ACE_Message_Block::rd_ptr() beyond valid data. The parser can then call dds/DCPS/transport/rtps_udp/RtpsSampleHeader.cpp in RtpsSampleHeader::init(), which dereferences the invalid read pointer without first validating it against wr_ptr() or ensuring that a complete submessage header remains. The resulting SIGSEGV occurs in the receive thread, terminates the DDS process, and destroys the DDS entities hosted by that participant. No authentication, prior protocol state, or victim interaction is required. This issue is fixed in version 3.34.0.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-52836 since 06/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Upgrading to version 3.34.0 eliminates this vulnerability.

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Productinfo

Name

• OpenDDS

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33

Website

• Product: https://github.com/OpenDDS/OpenDDS/

CPE 2.3info

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CPE 2.2info

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