# CVE-2011-2519: Null dereference in n/a

> Guest users can crash the hypervisor via invalid pointer dereference when hardware assisted paging is disabled.

- **Severity:** Medium 5.5 (`AV:A/AC:L/Au:S/C:N/I:N/A:C`)
- **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:** Yes
- **Published:** 27 Dec 2013
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-7vg8-g6px-4578

## What is CVE-2011-2519?

CVE-2011-2519 is a medium-severity vulnerability in Redhat Enterprise Linux Desktop, published on 27 Dec 2013. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2011-2519?

It affects 4 products.


Products: Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Xen Xen.

## How do I fix CVE-2011-2519?

Apply the vendor's patch.

## Is CVE-2011-2519 being exploited?

There is no known exploitation of CVE-2011-2519 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux Desktop

- [CVE-2016-5405](https://insights.sbomify.com/CVE-2016-5405/): Information disclosure in n/a (critical 9.8)
- [CVE-2016-7050](https://insights.sbomify.com/CVE-2016-7050/): Deserialization in n/a (critical 9.8)
- [CVE-2014-8241](https://insights.sbomify.com/CVE-2014-8241/): Null dereference in n/a (critical 9.8)
- [CVE-2014-8567](https://insights.sbomify.com/CVE-2014-8567/): Denial of service in n/a (critical 9.4)
- [CVE-2018-10897](https://insights.sbomify.com/CVE-2018-10897/): Path traversal in yum-utils: (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-2519 and fix it if it is affected.

What it is: CVE-2011-2519 is a medium-severity vulnerability in Redhat Enterprise Linux Desktop, published on 27 Dec 2013. 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-2011-2519 in the wild and no public exploit code.

Affected product: Redhat Enterprise Linux Desktop. 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-2011-2519/ (Markdown: https://insights.sbomify.com/CVE-2011-2519/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-2519
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-2519
- OSV: https://osv.dev/vulnerability/CVE-2011-2519

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-2519/
Summaries are generated and may contain mistakes; the official description above is the record.