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CVE-2016-6351

18
FAUCET Score

CVE-2016-6351 is a denial-of-service or arbitrary code execution vulnerability in QEMU's ESP/NCR53C9x controller emulation, affecting various Canonical, Debian, and QEMU products. A highly privileged local guest OS administrator can trigger an out-of-bounds write via DMA read into the ESP command buffer, leading to a QEMU process crash or arbitrary code execution on the host. Rated 6.7 MEDIUM, this vulnerability has a low attack complexity and high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.2CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 89th percentile among its peer group of 3,720 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 Advisories (1)

redhatCVE-2016-6351Moderate

Qemu: scsi: esp: OOB write access in esp_do_dma

Jun 15, 2016

References

git.qemu.org
git.qemu.org
lists.debian.org / debian-lts-announce/2018/11/msg00038.html
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/25/14
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/26/7
Mailing ListThird Party Advisory
securityfocus.com / bid/92119
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-3047-1
Third Party Advisory
ubuntu.com / usn/USN-3047-2
Third Party Advisory