---
title: "CVE-2015-5745\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2015-5745?format=md
keywords: index, follow
---

# CVE-2015-5745

Publication date 6 August 2015

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2015-5745?format=md#impact-score)

Toggle side navigation

## Description

Buffer overflow in the send\_control\_msg function in
hw/char/virtio-serial-bus.c in QEMU before 2.4.0 allows guest users to
cause a denial of service (QEMU process crash) via a crafted virtio control
message.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qemu | 15.04 vivid | Fixed 1:2.2+dfsg-5expubuntu9.4 |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Fixed 2.0.0+dfsg-2ubuntu1.17 |
| 12.04 LTS precise | Not in release |
| qemu-kvm | 15.04 vivid | Not in release |
| 14.10 utopic | Not in release |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2015-5745?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| qemu | * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=7882080388be5088e72c425b02223c02e6cb4295> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5745)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-5745)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-5745)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-5745)

### Related Ubuntu Security Notices (USN)

+ [USN-2724-1](https://usn.ubuntu.com/USN-2724-1)
+ QEMU vulnerabilities
+ 27 August 2015

### Other references

* <http://www.openwall.com/lists/oss-security/2015/08/06/3>
* <https://www.cve.org/CVERecord?id=CVE-2015-5745>