# CVE-2025-33126: Fixes to common vulnerabilities found in IBM Db2 High Performance Unload

> An authenticated user can cause a denial of service in IBM DB2 High Performance Unload due to an integer overflow in buffer size calculation.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Oct 2025
- **Updated:** 28 Oct 2025
- **Also known as:** GHSA-9266-4xcc-jjfm

## What is CVE-2025-33126?

CVE-2025-33126 is a medium-severity vulnerability in IBM DB2 High Performance Unload, published on 27 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM DB2 High Performance Unload 6.1.0.3, 5.1.0.1, 6.1.0.2, 6.5, 6.5.0.0 IF1, 6.1.0.1, 6.1, 5.1, 6.1.0.3, 5.1.0.1, 6.1.0.2, 6.5, 6.5.0.0 IF1, 6.1.0.1, 6.1, 5.1, 6.1.0.3, 5.1.0.1, 6.1.0.2, 6.5, 6.5.0.0 IF1, 6.1.0.1, 6.1, 5.1, 6.1.0.3, 5.1.0.1, 6.1.0.2, 6.5, 6.5.0.0 IF1, 6.1.0.1, 6.1, and 5.1 could allow an authenticated user to cause the program to crash due to the incorrect calculation of a buffer size.

Weakness: CWE-131 (Incorrect Calculation of Buffer Size)

## Which versions are affected by CVE-2025-33126?

It affects 1 product.


Products: Ibm Db2 High Performance Unload Load.

## How do I fix CVE-2025-33126?

No fix has been published for CVE-2025-33126 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-33126 being exploited?

There is no known exploitation of CVE-2025-33126 in the wild and no public exploit code.

## Other vulnerabilities in IBM DB2 High Performance Unload

- [CVE-2019-4523](https://insights.sbomify.com/CVE-2019-4523/): Memory corruption in DB2 High Performance Unload load for LUW (high 8.4)
- [CVE-2019-4447](https://insights.sbomify.com/CVE-2019-4447/): Privilege escalation in DB2 High Performance Unload load for LUW (high 8.4)
- [CVE-2019-4448](https://insights.sbomify.com/CVE-2019-4448/): Privilege escalation in DB2 High Performance Unload load for LUW (high 8.4)
- [CVE-2019-4606](https://insights.sbomify.com/CVE-2019-4606/): Other in DB2 High Performance Unload load for LUW (high 7.4)
- [CVE-2025-33131](https://insights.sbomify.com/CVE-2025-33131/): Fixes to common vulnerabilities found in IBM Db2 High Performance Unload (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-33126 and fix it if it is affected.

What it is: CVE-2025-33126 is a medium-severity vulnerability in IBM DB2 High Performance Unload, published on 27 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-33126 in the wild and no public exploit code.

Affected product: IBM DB2 High Performance Unload. 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-2025-33126/ (Markdown: https://insights.sbomify.com/CVE-2025-33126/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-33126
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-33126
- OSV: https://osv.dev/vulnerability/CVE-2025-33126

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-33126/
Summaries are generated and may contain mistakes; the official description above is the record.