What’s Vulnerable › Vulnerabilities

CVE-2021-38435: RTI Connext DDS Professional and Connext DDS Secure Incorrect Calculation of Buffer Size

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-05 · updated 2026-06-17
• Weakness: CWE-131

Description

RTI Connext DDS Professional and Connext DDS Secure Versions 4.2x to 6.1.0 not correctly calculate the size when allocating the buffer, which may result in a buffer overflow.

Affected products

• RTI Connext Professional: from 4.2 before 6.1.0 — fixed in 6.1.0
• RTI Connext Secure: from 4.2 before 6.1.0 — fixed in 6.1.0

How to fix

Upgrade to a fixed version: RTI Connext Professional 6.1.0; RTI Connext Secure 6.1.0. Check the vendor advisory for mitigations.

References

• https://support.rti.com/s/login/?ec=302&startURL=%2Fs%2F
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02
• https://support.rti.com/s/login/?ec=302&startURL=%2Fs%2F
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02

Get alerted when CVE-2021-38435 or the next vulnerability affects your stack