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CVE-2016-8669

22
FAUCET Score

CVE-2016-8669 describes a denial-of-service vulnerability in QEMU's serial_update_parameters function, affecting products like Debian, openSUSE, and Red Hat. Local guest OS administrators can trigger a divide-by-zero error and crash the QEMU process by manipulating the serial port's divider value. With a CVSS score of 6.0 (Medium), this vulnerability requires high privileges (PR:H) but has a low attack complexity (AC:L) and results in high availability impact (A:H). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.7.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
42.2CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.2:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*
8CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.0MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.5
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 77th percentile among its peer group of 3,720 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (12)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7Fixed in: qemu-kvm-rhev-10:2.9.0-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7Fixed in: qemu-kvm-rhev-10:2.9.0-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: qemu-kvm-rhev-10:2.9.0-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 11.0 (Ocata)Fixed in: qemu-kvm-rhev-10:2.9.0-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 8.0 (Liberty)Fixed in: qemu-kvm-rhev-10:2.9.0-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 9.0 (Mitaka)Fixed in: qemu-kvm-rhev-10:2.9.0-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: qemu-kvm-rhev-10:2.9.0-14.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kvm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)Fixed in: qemu-kvm-rhev

Vendor Advisories (1)

redhatCVE-2016-8669Low

Qemu: char: divide by zero error in serial_update_parameters

Oct 12, 2016

References

git.qemu.org
lists.opensuse.org / opensuse-updates/2016-12/msg00140.html
Mailing ListThird Party Advisory
access.redhat.com / errata/RHSA-2017:2392
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2408
Third Party Advisory
lists.debian.org / debian-lts-announce/2018/09/msg00007.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201611-11
Third Party Advisory
openwall.com / lists/oss-security/2016/10/14/9
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2016/10/15/5
Mailing ListThird Party Advisory
securityfocus.com / bid/93563
Third Party AdvisoryVDB Entry