Out-of-bounds read in Fast DDS - CVE-2026-45093
Published: November 9, 2026
Vulnerability identifier: #VU162813
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45093
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to cause a six-byte out-of-bounds read in Fast DDS TCP RTCP payload handling.
The vulnerability exists due to a size-accounting mismatch that includes payload metadata when calculating the bytes to copy after that metadata has already been skipped. An unauthenticated remote attacker can send a serialized payload over the TCP RTCP transport to copy six bytes beyond the logical payload into the receiver's payload buffer.
Affected software
Fast DDS
How to mitigate CVE-2026-45093
Install security update from vendor's website.
Fast DDS - addressed in versions 2.6.12, 2.14.7, 3.2.5, 3.4.3, 3.6.2