Out-of-bounds read in Fast DDS - CVE-2026-22590
Published: November 9, 2026
Vulnerability identifier: #VU162807
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-22590
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to disclose heap memory from a Fast DDS Discovery Server.
The vulnerability exists due to missing payload length validation when RTPS DATA_FRAG processing treats a small payload with a large declared sample size as the final fragment. An unauthenticated remote attacker can send a crafted UDP packet to trigger an out-of-bounds read and cause the server to relay leaked heap bytes to newly joining participants.
Affected software
Fast DDS
How to mitigate CVE-2026-22590
Install security update from vendor's website.
Fast DDS - addressed in versions 2.6.12, 2.14.6, 3.2.4, 3.3.1, 3.4.2