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CVE-2016-0749

34
FAUCET Score

CVE-2016-0749 describes a critical heap-based buffer overflow vulnerability within the smartcard interaction of SPICE, affecting products like Debian, Microsoft, openSUSE, and Red Hat. This flaw allows remote attackers to trigger a QEMU-KVM process crash, leading to a denial of service, or potentially execute arbitrary code simply by connecting to a guest VM. With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with low attack complexity and no user interaction required, posing a high risk to confidentiality, integrity, and availability. While the vulnerability is severe and has a high FAUCET Risk Score, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:scientific_computing:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.49%
Probability of exploitation in next 30 days
EPSS Percentile
94.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0849 is in the 90th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: spice-server-0:0.12.4-13.el6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: spice-0:0.12.4-15.el7_2.1
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Virtualization 3Fixed in: rhev-hypervisor

Vendor Advisories (1)

redhatCVE-2016-0749Important

spice: heap-based memory corruption within smartcard handling

Jun 6, 2016

References

lists.opensuse.org / opensuse-updates/2016-07/msg00003.html
lists.opensuse.org / opensuse-updates/2016-07/msg00004.html
access.redhat.com / errata/RHSA-2016:1204
access.redhat.com / errata/RHSA-2016:1205
security.gentoo.org / glsa/201606-05
debian.org / security/2016/dsa-3596
oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html
ubuntu.com / usn/USN-3014-1