---
title: "CVE-2017-7377\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-2017-7377?format=md
keywords: index, follow
---

# CVE-2017-7377

Publication date 10 April 2017

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**6.0 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-7377?format=md#impact-score)

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## Description

The (1) v9fs\_create and (2) v9fs\_lcreate functions in hw/9pfs/9p.c in QEMU
(aka Quick Emulator) allow local guest OS privileged users to cause a
denial of service (file descriptor or memory consumption) via vectors
related to an already in-use fid.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-7377?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qemu | 21.04 hirsute | Fixed 1:2.8+dfsg-3ubuntu3 |
| 20.10 groovy | Fixed 1:2.8+dfsg-3ubuntu3 |
| 20.04 LTS focal | Fixed 1:2.8+dfsg-3ubuntu3 |
| 19.10 eoan | Fixed 1:2.8+dfsg-3ubuntu3 |
| 19.04 disco | Fixed 1:2.8+dfsg-3ubuntu3 |
| 18.10 cosmic | Fixed 1:2.8+dfsg-3ubuntu3 |
| 18.04 LTS bionic | Fixed 1:2.8+dfsg-3ubuntu3 |
| 17.10 artful | Fixed 1:2.8+dfsg-3ubuntu3 |
| 17.04 zesty | Fixed 1:2.8+dfsg-3ubuntu2.2 |
| 16.10 yakkety | Fixed 1:2.6.1+dfsg-0ubuntu5.5 |
| 16.04 LTS xenial | Fixed 1:2.5+dfsg-5ubuntu10.14 |
| 14.04 LTS trusty | Fixed 2.0.0+dfsg-2ubuntu1.34 |
| 12.04 LTS precise | Not in release |
| qemu-kvm | 21.04 hirsute | Not in release |
| 20.10 groovy | Not in release |
| 20.04 LTS focal | Not in release |
| 19.10 eoan | Not in release |
| 19.04 disco | Not in release |
| 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Ignored end of life |

---

* [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-2017-7377?format=md#patch-details)

## Notes

---

### [tyhicks](https://launchpad.net/~tyhicks)

A privileged user in the guest can leak host memory
Affected code is in hw/9pfs/virtio-9p.c in older releases

### 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-project.org/?p=qemu.git;a=commit;h=d63fb193e71644a073b77ff5ac6f1216f2f6cf6e> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.0 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.0 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7377)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-7377)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-7377)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-7377)

### Related Ubuntu Security Notices (USN)

+ [USN-3289-1](https://usn.ubuntu.com/USN-3289-1)
+ QEMU vulnerabilities
+ 16 May 2017

### Other references

* <https://lists.gnu.org/archive/html/qemu-devel/2017-03/msg05449.html>
* <http://www.openwall.com/lists/oss-security/2017/04/03/2>
* <https://www.cve.org/CVERecord?id=CVE-2017-7377>