MEDIUM
CVE-2016-5403
CWE-400Published: August 2, 2016· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
The virtqueue_pop function in hw/virtio/virtio.c in QEMU allows local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) by submitting requests without waiting for completion.
Technical Analysis
CVE-2016-5403 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Oracle2 product(s)
linuxvm server
qemu1 product(s)
qemu
Red Hat8 product(s)
openstackvirtualizationenterprise linux desktopenterprise linux serverenterprise linux server ausenterprise linux server eusenterprise linux server tusenterprise linux workstation
Source: NVD CPE · 38 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (42)
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http://rhn.redhat.com/errata/RHSA-2016-1585.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1586.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1606.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1607.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1652.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1653.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1654.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1655.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1756.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1763.htmlThird Party Advisory
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http://rhn.redhat.com/errata/RHSA-2016-1943.htmlThird Party Advisory
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http://www.securityfocus.com/bid/92148Third Party Advisory · VDB Entry
Quick Facts
CVE IDCVE-2016-5403
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-400
CISA KEVNo
Affected5 vendor(s)
PublishedAug 2, 2016
Related CVEs (CWE-400)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2016-5403 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.