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CVE-2013-4535

22
FAUCET Score

CVE-2013-4535 describes a critical vulnerability in QEMU versions prior to 1.7.2, specifically within the virtqueue_map_sg function in hw/virtio/virtio.c, affecting virtio-block and virtio-serial read operations. This flaw allows remote attackers to execute arbitrary files by leveraging a crafted savevm image. With a CVSS v3.1 score of 8.8 (High), the vulnerability has a local attack vector, low attack complexity, and high impacts on confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.7.2CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:redhat:virtualization:3.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_tus:6.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 91st percentile among its peer group of 17,070 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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 (9)

redhatpatch availablevia redhat_api
Product: OpenStack 3 for RHEL 6Fixed in: qemu-kvm-rhev-2:0.12.1.2-2.415.el6_5.10
View patch
redhatpatch availablevia redhat_api
Product: OpenStack 4 for RHEL 6Fixed in: qemu-kvm-rhev-2:0.12.1.2-2.415.el6_5.10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm-2:0.12.1.2-2.415.el6_5.10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm-10:1.5.3-60.el7_0.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7Fixed in: qemu-kvm-rhev-10:1.5.3-60.el7_0.7
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-6Fixed in: qemu-kvm-rhev-2:0.12.1.2-2.415.el6_5.10
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-6Fixed in: rhev-hypervisor6-0:6.5-20140603.2.el6ev
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kvm

Vendor Advisories (1)

redhatCVE-2013-4535Moderate

qemu: virtio: insufficient validation of num_sg when mapping

Dec 3, 2013

References

git.qemu.org
lists.fedoraproject.org / pipermail/package-announce/2014-May/133345.html
Third Party Advisory
lists.nongnu.org / archive/html/qemu-stable/2014-07/msg00187.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2014-0743.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2014-0744.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory