# CVE-2016-5338: Memory corruption in n/a

> Local guest administrators can crash QEMU or execute arbitrary code on the host via buffer issues in the ESP SCSI controller emulation.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** Yes
- **Published:** 14 Jun 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-5338, GHSA-g4j5-678q-qp7j, UBUNTU-CVE-2016-5338

## What is CVE-2016-5338?

CVE-2016-5338 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 14 Jun 2016. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The (1) esp_reg_read and (2) esp_reg_write functions in hw/scsi/esp.c in QEMU allow local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the QEMU host via vectors related to the information transfer buffer.

## Which versions are affected by CVE-2016-5338?

It affects 3 products.


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

## How do I fix CVE-2016-5338?

Apply the vendor's patch.

## Is CVE-2016-5338 being exploited?

There is no known exploitation of CVE-2016-5338 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-2016-5338 and fix it if it is affected.

What it is: CVE-2016-5338 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 14 Jun 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-2016-5338 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-2016-5338/ (Markdown: https://insights.sbomify.com/CVE-2016-5338/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-5338
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-5338
- OSV: https://osv.dev/vulnerability/CVE-2016-5338

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-5338/
Summaries are generated and may contain mistakes; the official description above is the record.