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CVE-2026-52836— OpenDDS: out-of-bounds `rd_ptr` dereference in `RtpsSampleHeader::init` — triggered by malformed RTPS submessage, remotely exploitable denial of service

Quick assessment

Affected
OpenDDS OpenDDS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenDDS 是对象管理组织（OMG）数据分发服务（DDS）的一个开源 C++ 实现。在 3.34.0 版本之前，网络攻击者可以通过发送一个格式错误的 RTPS UDP 子消息，使可达的 OpenDDS 参与者崩溃。该恶意构造的长度或序列号状态会导致 （位于 文件中）将 移动到有效数据范围之外。随后，解析器会调用 （位于 ），在未先验证读取指针是否超出 或确保完整的子消息头仍然存在的条件下，直接解引用了该无效的读取指针。由此引发的 SIGSEGV（段错误）发生在接收线程中，导致 DDS 进程终止，并摧毁了该参与者

CVSS 8.7 · High EPSS 0.02% · P4

Possible ATT&CK Techniques 1 AI

T1480 · Execution Guardrails

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenDDS OpenDDS < 3.34.0 affected
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I. Basic Information for CVE-2026-52836

Vulnerability Information
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Vulnerability Title
OpenDDS: out-of-bounds `rd_ptr` dereference in `RtpsSampleHeader::init` — triggered by malformed RTPS submessage, remotely exploitable denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenDDS OpenDDS < 3.34.0 -

II. Public POCs for CVE-2026-52836

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III. Intelligence Information for CVE-2026-52836

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Patches & Fixes for CVE-2026-52836 (5)

Vendor Advisories for CVE-2026-52836 (1)

Vendor Pages for CVE-2026-52836 (1)

IV. Related Vulnerabilities

Same product: OpenDDS
Same vendor: OpenDDS
Same weakness: CWE-125

V. Comments for CVE-2026-52836

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