# CVE-2025-63829: Integer overflow in n/a

> An attacker can cause a denial of service via an infinite loop triggered by an integer overflow in the Fast-DDS library.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Nov 2025
- **Updated:** 18 Nov 2025
- **Also known as:** DEBIAN-CVE-2025-63829, GHSA-8m8h-xwp6-pgjf, UBUNTU-CVE-2025-63829

## What is CVE-2025-63829?

CVE-2025-63829 is a medium-severity vulnerability in n/a, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

eProsima Fast-DDS v3.3 and before has an infinite loop vulnerability caused by integer overflow in the Time_t:: fraction() function.

Weakness: CWE-190 (Integer Overflow or Wraparound), CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2025-63829?

It affects 1 product.


Products: Eprosima Fast Dds.

## How do I fix CVE-2025-63829?

No fix has been published for CVE-2025-63829 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-63829 being exploited?

There is no known exploitation of CVE-2025-63829 in the wild and no public exploit code.

## 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-2025-63829 and fix it if it is affected.

What it is: CVE-2025-63829 is a medium-severity vulnerability in n/a, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-63829 in the wild and no public exploit code.

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-2025-63829/ (Markdown: https://insights.sbomify.com/CVE-2025-63829/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-63829
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-63829
- OSV: https://osv.dev/vulnerability/CVE-2025-63829

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-63829/
Summaries are generated and may contain mistakes; the official description above is the record.