Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2016-9923

16
FAUCET Score

CVE-2016-9923 describes a use-after-free vulnerability in Quick Emulator (Qemu) when built with chardev backend support, specifically during hotplug and unplug operations of devices within a guest. This flaw allows a malicious guest user or process to crash the Qemu process on the host, leading to a denial of service (DoS). Rated with a CVSS score of 5.5 (Medium), it requires local access and low privileges within the guest, with no user interaction needed. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.7.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.21%
Probability of exploitation in next 30 days
EPSS Percentile
65.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0121 is in the 97th percentile among its peer group of 15,938 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (7)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 6 (Juno)Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 8 (Liberty)Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 9 (Mitaka)Fixed in: qemu-kvm-rhev

Vendor Advisories (1)

redhatCVE-2016-9923Low

Qemu: char: use-after-free issue during hotplug and unplugging device

Nov 24, 2016

References

security.gentoo.org / glsa/201701-49
Third Party Advisory
openwall.com / lists/oss-security/2016/12/09/2
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/94827
Third Party AdvisoryVDB Entry