CVE-2016-1922

Name: CVE-2016-1922
Creator: NVD / NIST
Published: 2016-12-29T22:59:00.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2016-1922 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.

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

0.43%

34.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.5.1.1
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0

References

http://www.debian.org/security/2016/dsa-3469Third Party Advisory
http://www.debian.org/security/2016/dsa-3470Third Party Advisory
http://www.debian.org/security/2016/dsa-3471Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/16/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/16/6Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/81058Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1283934Issue Tracking, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.htmlPatch, Vendor Advisory
https://security.gentoo.org/glsa/201604-01Third Party Advisory
http://www.debian.org/security/2016/dsa-3469Third Party Advisory
http://www.debian.org/security/2016/dsa-3470Third Party Advisory
http://www.debian.org/security/2016/dsa-3471Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/16/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/16/6Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/81058Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1283934Issue Tracking, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.htmlPatch, Vendor Advisory
https://security.gentoo.org/glsa/201604-01Third Party Advisory

Timeline

Published: Dec 29, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-1922?

How severe is CVE-2016-1922?

CVE-2016-1922 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2016-1922?

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-2016-1922?

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

Scan your code now

Source: NVD / NIST