# CVE-2021-38425: fastdds: eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially...

CVE-2021-38425 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2021-38425, released May 5, 2022. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2021-38425
- Priority: Urgent
- CVSS: 9.1 (critical)
- EPSS: 0.0502
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 5, 2022

## Description

eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | fastdds Debian 12.15 (bookworm) | 2.6.1+ds-1 | [DEBIAN-CVE-2021-38425](https://patchblox.com/security/data/fix/linux/debian-cve-2021-38425.md) | May 5, 2022 |
| Linux | fastdds Debian 13.5 (trixie) | 2.6.1+ds-1 | [DEBIAN-CVE-2021-38425](https://patchblox.com/security/data/fix/linux/debian-cve-2021-38425.md) | May 5, 2022 |
| Linux | fastdds-tools Ubuntu 22.04.1 LTS (jammy) | 2.5.0+ds-3ubuntu0.1~esm1 | [fastdds-tools 2.5.0+ds-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-fastdds-tools-2.5.0-ds-3ubuntu0.1-esm1.md) | Aug 11, 2023 |
| Linux | libfastrtps2.5 Ubuntu 22.04.1 LTS (jammy) | 2.5.0+ds-3ubuntu0.1~esm1 | [libfastrtps2.5 2.5.0+ds-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libfastrtps2.5-2.5.0-ds-3ubuntu0.1-esm1.md) | Aug 11, 2023 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.