# CVE-2016-6351: Memory corruption in n/a

> Local guest administrators can execute arbitrary code or crash the host via out-of-bounds write in QEMU's ESP controller emulation.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Sep 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-6351, GHSA-f7gh-f5wg-p6m2, UBUNTU-CVE-2016-6351

## What is CVE-2016-6351?

CVE-2016-6351 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 7 Sep 2016. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The esp_do_dma function in hw/scsi/esp.c in QEMU (aka Quick Emulator), when built with ESP/NCR53C9x controller emulation support, allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the QEMU host via vectors involving DMA read into ESP command buffer.

## Which versions are affected by CVE-2016-6351?

It affects 3 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Qemu Qemu.

## How do I fix CVE-2016-6351?

Apply the vendor's patch.

## Is CVE-2016-6351 being exploited?

There is no known exploitation of CVE-2016-6351 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-6351 and fix it if it is affected.

What it is: CVE-2016-6351 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 7 Sep 2016. 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-2016-6351 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2016-6351/ (Markdown: https://insights.sbomify.com/CVE-2016-6351/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-6351
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-6351
- OSV: https://osv.dev/vulnerability/CVE-2016-6351

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-6351/
Summaries are generated and may contain mistakes; the official description above is the record.