CVE-2020-14394

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with an admin-level account. Limited direct impact.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-08-17 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:54 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 3.2 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-08-17 21:15 UTC

Last modified

2026-06-17 02:54 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-835

Record status

Modified

Affected

• Qemu 6.1.50
• Fedoraproject Extra Packages For Enterprise Linux 7.0
• Fedoraproject Fedora 33
• Fedoraproject Fedora 37
• Redhat Openstack Platform 10.0
• Redhat Openstack Platform 13.0
• Redhat Enterprise Linux 5.0
• Redhat Enterprise Linux 6.0

Attack profile CVSS 3.1 · 3.2

Attack vector

Local

Complexity

Low

Privileges needed

High

User interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2020-14394.md and follow it. Check whether this project is affected by CVE-2020-14394. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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