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CVE-2014-3633

21
FAUCET Score

CVE-2014-3633 is an out-of-bounds read vulnerability in the qemuDomainGetBlockIoTune function of libvirt before version 1.2.9, affecting canonical libvirt and Ubuntu Linux. This flaw allows remote attackers to trigger a denial of service or read sensitive heap information by sending a crafted blkiotune query, particularly when a disk has been hot-plugged or removed. Rated with a CVSS score of 5.8, it has a network attack vector and medium attack complexity, with potential for partial impact to confidentiality and availability. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
10.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:lts:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:lts:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
<= 1.2.8CPE matchmatch criteria
cpe:2.3:a:libvirt:libvirt:*:*:*:*:*:*:*:*
1.2.0CPE matchmatch criteria
cpe:2.3:a:libvirt:libvirt:1.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:N/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.75%
Probability of exploitation in next 30 days
EPSS Percentile
84.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0275 is in the 76th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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: libvirt-0:0.10.2-46.el6_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libvirt-0:1.1.1-29.el7_0.3
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Storage 2.1Fixed in: libvirt

Vendor Advisories (1)

redhatCVE-2014-3633Moderate

libvirt: qemu: out-of-bounds read access in qemuDomainGetBlockIoTune() due to invalid index

Sep 17, 2014

References

libvirt.org / git
lists.opensuse.org / opensuse-updates/2014-10/msg00014.html
lists.opensuse.org / opensuse-updates/2014-10/msg00017.html
rhn.redhat.com / errata/RHSA-2014-1352.html
secunia.com / advisories/60291
secunia.com / advisories/60895
security.gentoo.org / glsa/glsa-201412-04.xml
security.libvirt.org / 2014/0004.html
Vendor Advisory
debian.org / security/2014/dsa-3038
ubuntu.com / usn/USN-2366-1