CVE-2016-9923

Name: CVE-2016-9923
Creator: NVD / NIST
Published: 2016-12-23T22:59:00.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2016-9923 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Quick Emulator (Qemu) built with the 'chardev' backend support is vulnerable to a use after free issue. It could occur while hotplug and unplugging the device in the guest. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

Quick Emulator (Qemu) built with the 'chardev' backend support is vulnerable to a use after free issue. It could occur while hotplug and unplugging the device in the guest. A guest user/process could use this flaw to crash a Qemu process on the host resulting in DoS.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.21%

64.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.7.1

References

http://www.openwall.com/lists/oss-security/2016/12/09/2Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/94827Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201701-49Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/12/09/2Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/94827Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201701-49Third Party Advisory

Timeline

Published: Dec 23, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9923?

How severe is CVE-2016-9923?

CVE-2016-9923 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9923?

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-2016-9923?

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

Scan your code now

Source: NVD / NIST