# CVE-2004-0626: Integer overflow in n/a

> Remote attackers can cause a denial of service via CPU consumption in the Linux kernel netfilter subsystem when specific TCP option rules are configured.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jul 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-hvfj-m7r2-j689

## What is CVE-2004-0626?

CVE-2004-0626 is a medium-severity vulnerability in Conectiva Linux, published on 6 Jul 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules, allows remote attackers to cause a denial of service (CPU consumption by infinite loop) via a large option length that produces a negative integer after a casting operation to the char type.

## Which versions are affected by CVE-2004-0626?

It affects 4 products.


Products: Conectiva Linux, Gentoo Linux, Linux kernel, Suse Suse Linux.

## How do I fix CVE-2004-0626?

No fix has been published for CVE-2004-0626 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-0626 being exploited?

There is no known exploitation of CVE-2004-0626 in the wild and no public exploit code.

## Other vulnerabilities in Conectiva Linux

- [CVE-2005-3625](https://insights.sbomify.com/CVE-2005-3625/): Denial of service in n/a (critical 10.0)
- [CVE-2004-0882](https://insights.sbomify.com/CVE-2004-0882/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0902](https://insights.sbomify.com/CVE-2004-0902/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0903](https://insights.sbomify.com/CVE-2004-0903/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0904](https://insights.sbomify.com/CVE-2004-0904/): Integer overflow in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0626 and fix it if it is affected.

What it is: CVE-2004-0626 is a medium-severity vulnerability in Conectiva Linux, published on 6 Jul 2004. 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-2004-0626 in the wild and no public exploit code.

Affected product: Conectiva Linux. 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-2004-0626/ (Markdown: https://insights.sbomify.com/CVE-2004-0626/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0626
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0626
- OSV: https://osv.dev/vulnerability/CVE-2004-0626

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0626/
Summaries are generated and may contain mistakes; the official description above is the record.