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CVE-2013-4399

16
FAUCET Score

CVE-2013-4399 describes a use-after-free vulnerability in libvirt versions prior to 1.1.3, specifically within the remoteClientFreeFunc function when ACLs are enabled. This flaw allows remote attackers to trigger a denial of service by registering an event handler and then closing the connection, leading to a crash. With a CVSS score of 4.3 (AV:N/AC:M/Au:N/C:N/I:N/A:P), it is a medium-severity vulnerability requiring medium attack complexity and resulting in partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.3CPE matchmatch criteria
cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:*
0.0.1CPE matchmatch criteria
cpe:2.3:a:redhat:libvirt:0.0.1:*:*:*:*:*:*:*
0.0.2CPE matchmatch criteria
cpe:2.3:a:redhat:libvirt:0.0.2:*:*:*:*:*:*:*
0.0.3CPE matchmatch criteria
cpe:2.3:a:redhat:libvirt:0.0.3:*:*:*:*:*:*:*
0.0.4CPE matchmatch criteria
cpe:2.3:a:redhat:libvirt:0.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.08%
Probability of exploitation in next 30 days
EPSS Percentile
79.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0208 is in the 66th percentile among its peer group of 19,958 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

Vendor Advisories (1)

redhatCVE-2013-4399Moderate

libvirt: unprivileged user can crash libvirtd when ACLs are enabled

Sep 27, 2013

References

libvirt.org / git
secunia.com / advisories/60895
security.gentoo.org / glsa/glsa-201412-04.xml
security.libvirt.org / 2013/0013.html
PatchVendor Advisory
securityfocus.com / bid/62972