LOW
CVE-2020-14394
CWE-835Published: August 17, 2022· Updated: Jun 17, 2026
3.2
CVSS v3.1
Official Description
An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.
Technical Analysis
CVE-2020-14394 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeChanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
Affected Vendors & Products
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
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Official Patches & Advisories
All References (8)
→
https://bugzilla.redhat.com/show_bug.cgi?id=1908004Exploit · Issue Tracking · Third Party Advisory
→
https://gitlab.com/qemu-project/qemu/-/issues/646Exploit · Issue Tracking · Patch · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1908004Exploit · Issue Tracking · Third Party Advisory
→
https://gitlab.com/qemu-project/qemu/-/issues/646Exploit · Issue Tracking · Patch · Third Party Advisory
Quick Facts
CVE IDCVE-2020-14394
CVSS Score3.2 / 10
SeverityLOW
WeaknessCWE-835
CISA KEVNo
Affected3 vendor(s)
PublishedAug 17, 2022
Related CVEs (CWE-835)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-14394 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.