# CVE-2007-3722: Denial of service in n/a

> Local attackers can cause CPU exhaustion and denial of service in the FreeBSD kernel by exploiting the 4BSD scheduler's sampling mechanism.

- **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:** 12 Jul 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-6w9q-h3xg-92gf

## What is CVE-2007-3722?

CVE-2007-3722 is a low-severity denial of service vulnerability in Freebsd Freebsd, published on 12 Jul 2007. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The 4BSD process scheduler in the FreeBSD kernel performs scheduling based on CPU billing gathered from periodic process sampling ticks, which allows local users to cause a denial of service (CPU consumption) by performing voluntary nanosecond sleeps that result in the process not being active during a clock interrupt, as described in "Secretly Monopolizing the CPU Without Superuser Privileges."

## Which versions are affected by CVE-2007-3722?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2007-3722?

No fix has been published for CVE-2007-3722 yet. Limit exposure of the affected software until one is available.

## Is CVE-2007-3722 being exploited?

There is no known exploitation of CVE-2007-3722 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-3722 and fix it if it is affected.

What it is: CVE-2007-3722 is a low-severity denial of service vulnerability in Freebsd Freebsd, published on 12 Jul 2007. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2007-3722 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. 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-2007-3722/ (Markdown: https://insights.sbomify.com/CVE-2007-3722/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-3722
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-3722
- OSV: https://osv.dev/vulnerability/CVE-2007-3722

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-3722/
Summaries are generated and may contain mistakes; the official description above is the record.