Uncontrolled Memory Allocation in Fast DDS - CVE-2026-45097
Published: July 22, 2026
Vulnerability identifier: #VU139094
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-45097
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: eProsima
Affected software:
Fast DDS
Fast DDS
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to memory allocation with excessive size value in DynamicType CDR deserialization when processing a crafted CDR wire buffer containing an unbounded sequence_length value. A remote attacker can send a specially crafted serialized sample to cause a denial of service.
Both XCDRv1 and XCDRv2 deserialization paths are affected, and the issue impacts subscribers using DynamicTypes.
How to mitigate CVE-2026-45097
Install security update from vendor's website.