Uncontrolled Memory Allocation in Fast DDS - CVE-2026-63340
Published: July 22, 2026
Vulnerability identifier: #VU139069
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-63340
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to unchecked sampleSize in RTPS DATA_FRAG. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
Fast DDS
How to mitigate CVE-2026-63340
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.