# CVE-2004-0949: Information disclosure in n/a

> A remote attacker can read arbitrary kernel memory or cause a denial of service by sending malformed fragmented SMB packets to a Linux system using the smbfs filesystem.

- **Severity:** Medium 6.4 (`AV:N/AC:L/Au:N/C:P/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Dec 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-pj7f-5c59-qj9r

## What is CVE-2004-0949?

CVE-2004-0949 is a medium-severity vulnerability in Linux kernel, published on 1 Dec 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The smb_recv_trans2 function call in the samba filesystem (smbfs) in Linux kernel 2.4 and 2.6 does not properly handle the re-assembly of fragmented packets correctly, which could allow remote samba servers to (1) read arbitrary kernel information or (2) raise a counter value to an arbitrary number by sending the first part of the fragmented packet multiple times.

## Which versions are affected by CVE-2004-0949?

It affects 8 products.


Products: Linux kernel, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Fedora Core, Redhat Linux Advanced Workstation, Suse Suse Linux, Trustix Secure Linux, Ubuntu Ubuntu Linux.

## How do I fix CVE-2004-0949?

Apply the vendor's patch.

## Is CVE-2004-0949 being exploited?

There is no known exploitation of CVE-2004-0949 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0949 and fix it if it is affected.

What it is: CVE-2004-0949 is a medium-severity vulnerability in Linux kernel, published on 1 Dec 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-2004-0949 in the wild and no public exploit code.

Affected product: Linux kernel. 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-2004-0949/ (Markdown: https://insights.sbomify.com/CVE-2004-0949/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0949
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0949
- OSV: https://osv.dev/vulnerability/CVE-2004-0949

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0949/
Summaries are generated and may contain mistakes; the official description above is the record.