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CVE-2016-6834

18
FAUCET Score

CVE-2016-6834 describes a denial-of-service vulnerability in QEMU, specifically within the net_tx_pkt_do_sw_fragmentation function, affecting Debian and QEMU installations. A local guest OS administrator can trigger an infinite loop and crash the QEMU process by providing a zero-length current fragment. This vulnerability has a CVSS score of 4.4 (Medium), indicating a local attack vector with low complexity, requiring high privileges, and resulting in high availability impact. 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
<= 2.6.2CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
2.7.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.7.0:rc0:*:*:*:*:*:*
2.7.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.7.0:rc1:*:*:*:*:*:*
2.7.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.7.0:rc2:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.4MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 82nd 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

Vendor Patches (6)

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

Vendor Advisories (1)

redhatCVE-2016-6834Low

Qemu: net: vmxnet3: an infinite loop during packet fragmentation

Aug 9, 2016

References

git.qemu.org
lists.debian.org / debian-lts-announce/2018/11/msg00038.html
Mailing ListThird Party Advisory
lists.gnu.org / archive/html/qemu-devel/2016-08/msg01601.html
PatchThird Party Advisory
security.gentoo.org / glsa/201609-01
Third Party Advisory
openwall.com / lists/oss-security/2016/08/11/8
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/08/18/7
Mailing ListThird Party Advisory
securityfocus.com / bid/92446
Third Party AdvisoryVDB Entry