# CVE-2001-0907: Denial of service in n/a

> Local attackers can cause a denial of service in the Linux kernel by creating deeply nested symlinks, leading to excessive processing time.

- **Severity:** Low 2.1 (`AV:L/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-ccmf-3rv3-jmxv

## What is CVE-2001-0907?

CVE-2001-0907 is a low-severity denial of service vulnerability in Linux kernel, published on 1 Sep 2004. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Linux kernel 2.2.1 through 2.2.19, and 2.4.1 through 2.4.10, allows local users to cause a denial of service via a series of deeply nested symlinks, which causes the kernel to spend extra time when trying to access the link.

## Which versions are affected by CVE-2001-0907?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2001-0907?

No fix has been published for CVE-2001-0907 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-0907 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2001-0907 exists.

Public exploit code:

- Linux Kernel 2.2/2.4 - Deep Symbolic Link Denial of Service (exploitdb)

## 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-2001-0907 and fix it if it is affected.

What it is: CVE-2001-0907 is a low-severity denial of service vulnerability in Linux kernel, published on 1 Sep 2004. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2001-0907 exists.

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-2001-0907/ (Markdown: https://insights.sbomify.com/CVE-2001-0907/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-0907
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-0907
- OSV: https://osv.dev/vulnerability/CVE-2001-0907

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-0907/
Summaries are generated and may contain mistakes; the official description above is the record.