# CVE-2014-0147: Integer overflow in Qemu

> An integer overflow in Qemu's QCOW2 snapshot creation allows attackers to cause a denial of service via crafted disk images.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Feb 2020
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2014-0147, GHSA-gx9j-r5m2-p97g

## What is CVE-2014-0147?

CVE-2014-0147 is a medium-severity vulnerability in Fedoraproject Fedora, published on 11 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Qemu before 1.6.2 block diver for the various disk image formats used by Bochs and for the QCOW version 2 format, are vulnerable to a possible crash caused by signed data types or a logic error while creating QCOW2 snapshots, which leads to incorrectly calling update_refcount() routine.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2014-0147?

It affects 10 products.


Products: Fedoraproject Fedora, Qemu Qemu, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Openstack Platform, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Tus, Redhat Enterprise Linux Workstation, Redhat Virtualization.

## How do I fix CVE-2014-0147?

Upgrade to a fixed version.

## Is CVE-2014-0147 being exploited?

There is no known exploitation of CVE-2014-0147 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-0147 and fix it if it is affected.

What it is: CVE-2014-0147 is a medium-severity vulnerability in Fedoraproject Fedora, published on 11 Feb 2020. 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-2014-0147 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2014-0147/ (Markdown: https://insights.sbomify.com/CVE-2014-0147/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-0147
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-0147
- OSV: https://osv.dev/vulnerability/CVE-2014-0147

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-0147/
Summaries are generated and may contain mistakes; the official description above is the record.