# CVE-2011-1768: Race condition in n/a

> Remote attackers can cause a denial of service in the Linux kernel by sending packets during tunnel module loading.

- **Severity:** Medium 5.4 (`AV:N/AC:H/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Jun 2012
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-vjvh-j8wp-qpwm

## What is CVE-2011-1768?

CVE-2011-1768 is a medium-severity vulnerability in Linux kernel, published on 13 Jun 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The tunnels implementation in the Linux kernel before 2.6.34, when tunnel functionality is configured as a module, allows remote attackers to cause a denial of service (OOPS) by sending a packet during module loading.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2011-1768?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2011-1768?

Upgrade to a fixed version.

## Is CVE-2011-1768 being exploited?

There is no known exploitation of CVE-2011-1768 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-2011-1768 and fix it if it is affected.

What it is: CVE-2011-1768 is a medium-severity vulnerability in Linux kernel, published on 13 Jun 2012. 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-2011-1768 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-2011-1768/ (Markdown: https://insights.sbomify.com/CVE-2011-1768/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1768
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1768
- OSV: https://osv.dev/vulnerability/CVE-2011-1768

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1768/
Summaries are generated and may contain mistakes; the official description above is the record.