# CVE-2007-3732: Null dereference in linux-2.6

> A flaw in the Linux kernel's interrupt handling can cause a crash due to improper segment register restoration, leading to denial of service.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Nov 2019
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-6732-cc4q-jp7r

## What is CVE-2007-3732?

CVE-2007-3732 is a medium-severity vulnerability in Linux kernel, published on 7 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In Linux 2.6 before 2.6.23, the TRACE_IRQS_ON function in iret_exc calls a C function without ensuring that the segments are set properly. The kernel's %fs needs to be restored before the call in TRACE_IRQS_ON and before enabling interrupts, so that "current" references work. Without this, "current" used in the window between iret_exc and the middle of error_code where %fs is reset, would crash.

## Which versions are affected by CVE-2007-3732?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2007-3732?

No fix has been published for CVE-2007-3732 yet. Limit exposure of the affected software until one is available.

## Is CVE-2007-3732 being exploited?

There is no known exploitation of CVE-2007-3732 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-2007-3732 and fix it if it is affected.

What it is: CVE-2007-3732 is a medium-severity vulnerability in Linux kernel, published on 7 Nov 2019. 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-2007-3732 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-2007-3732/ (Markdown: https://insights.sbomify.com/CVE-2007-3732/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-3732
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-3732
- OSV: https://osv.dev/vulnerability/CVE-2007-3732

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-3732/
Summaries are generated and may contain mistakes; the official description above is the record.