# CVE-2025-65865: Integer overflow in n/a

> Attackers can cause a Denial of Service in eProsima Fast-DDS via crafted input exploiting an integer overflow.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Dec 2025
- **Updated:** 5 Jul 2026
- **Also known as:** DEBIAN-CVE-2025-65865, GHSA-hcvp-hrr6-563f, UBUNTU-CVE-2025-65865

## What is CVE-2025-65865?

CVE-2025-65865 is a high-severity vulnerability in n/a, published on 23 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An integer overflow in eProsima Fast-DDS v3.3 allows attackers to cause a Denial of Service (DoS) via a crafted input.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2025-65865?

It affects 1 product.


Products: Eprosima Fast Dds.

## How do I fix CVE-2025-65865?

No fix has been published for CVE-2025-65865 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-65865 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65865 exists.

## Other vulnerabilities in n/a

- [CVE-2025-67108](https://insights.sbomify.com/CVE-2025-67108/): Security feature bypass in n/a (critical 10.0)
- [CVE-2024-28231](https://insights.sbomify.com/CVE-2024-28231/): Manipulated DATA Submessage causes a heap-buffer-overflow error (critical 9.7)
- [CVE-2023-50716](https://insights.sbomify.com/CVE-2023-50716/): Invalid DATA_FRAG Submessage causes a bad-free error (critical 9.7)
- [CVE-2023-50257](https://insights.sbomify.com/CVE-2023-50257/): Disconnect Vulnerability in RTPS Packets Used by SROS2 (critical 9.7)
- [CVE-2023-42459](https://insights.sbomify.com/CVE-2023-42459/): Malformed DATA submessage leads to bad-free error in Fast-DDS (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-65865 and fix it if it is affected.

What it is: CVE-2025-65865 is a high-severity vulnerability in n/a, published on 23 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65865 exists.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-65865/ (Markdown: https://insights.sbomify.com/CVE-2025-65865/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65865
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65865
- OSV: https://osv.dev/vulnerability/CVE-2025-65865

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65865/
Summaries are generated and may contain mistakes; the official description above is the record.