CVE-2016-6833

Name: CVE-2016-6833
Creator: NVD / NIST
Published: 2016-12-10T00:59:03.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2016-6833 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.

Metrics

CVSS 3.1

4.4/10

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

EPSS Probability

0.39%

30.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions	Update
Qemu	Qemu	<= 2.6.2	—
Qemu	Qemu	2.7.0	Rc0
Debian	Debian Linux	8.0	—

References

http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8
http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/93255Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201609-01Third Party Advisory
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8
http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/93255Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201609-01Third Party Advisory

Timeline

Published: Dec 10, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6833?

How severe is CVE-2016-6833?

CVE-2016-6833 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6833?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-6833?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST