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CVE-2013-4377

11
FAUCET Score

CVE-2013-4377 is a use-after-free vulnerability in the virtio-pci implementation of Qemu versions 1.4.0 through 1.6.0. This flaw allows authenticated local users to trigger a denial of service by "hot-unplugging" a virtio device, leading to a daemon crash. With a CVSS score of 2.3, it is considered low severity, requiring authenticated access and medium attack complexity, with the primary impact being partial availability. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion, indicating a low threat level.

Impacted Technologies

VendorProductVersion(s)CPE
1.4.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:1.4.0:*:*:*:*:*:*:*
1.4.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:1.4.1:*:*:*:*:*:*:*
1.4.2CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:1.4.2:*:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:1.5.0:*:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:1.5.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.3LOW

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
4.4
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 50th percentile among its peer group of 27 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, 0.1 Bluesky, 0.0 Mastodon, and 0.0 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-2013-4377Moderate

qemu: hot-unplugging virtio devices in guest can crash host qemu process

Jul 11, 2013

References

lists.nongnu.org / archive/html/qemu-devel/2013-09/msg03347.html
Patch
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/55015
Vendor Advisory
openwall.com / lists/oss-security/2013/09/26/5
ubuntu.com / usn/USN-2092-1