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NVD / CVE Program· CNA redhat

CVE-2020-14394: An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB)…

LowCVSS 3.2 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 12/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: qemu (Debian:10) 1:3.1+dfsg-8+deb10u10; qemu (Debian:12) 1:7.1+dfsg-1; qemu-linux-user (openSUSE:Leap 15.4) 6.2.0-150400.37.14.1.

Low priority for now. Upgrade to qemu (Debian:10) 1:3.1+dfsg-8+deb10u10; qemu (Debian:12) 1:7.1+dfsg-1; qemu-linux-user (openSUSE:Leap 15.4) 6.2.0-150400.37.14.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Aug 17, 2022
Updated
Jun 16, 2026
EPSS
0.3% · 33th percentile

Report tools

JSON

Action score

12

Monitor

Low priority for now.

CVSS
12 / 40 · 3.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-14394

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
qemuqemu
fedoraprojectextra packages for enterprise linux
fedoraprojectfedora
redhatopenstack platform
redhatenterprise linux

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a QEMU

    • QEMU 6.1.50affected
Affected versions · NVD (11)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject extra packages for enterprise linux7.0
  • fedoraproject fedora33
  • fedoraproject fedora37
  • qemu qemu6.1.50
  • redhat enterprise linux5.0
  • redhat enterprise linux6.0
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0
  • redhat openstack platform10.0
  • redhat openstack platform13.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10qemubefore 1:3.1+dfsg-8+deb10u101:3.1+dfsg-8+deb10u10
Debian:12qemubefore 1:7.1+dfsg-11:7.1+dfsg-1
openSUSE:Leap 15.4qemu-linux-userbefore 6.2.0-150400.37.14.16.2.0-150400.37.14.1
openSUSE:Leap 15.4qemu-testsuitebefore 6.2.0-150400.37.14.16.2.0-150400.37.14.1
openSUSE:Leap Micro 5.3qemubefore 6.2.0-150400.37.14.26.2.0-150400.37.14.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOSqemubefore 5.2.0-150300.121.25.2.0-150300.121.2
SUSE:Linux Enterprise Micro 5.3qemubefore 6.2.0-150400.37.14.26.2.0-150400.37.14.2
SUSE:Linux Enterprise Server 12 SP5qemubefore 3.1.1.1-66.13.1.1.1-66.1

Same product

qemu: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-12928The QMP migrate command in QEMU version 4.0.0 and earlier is vulnerable to OS command injection, which allows the remote attacker to…
    60This week
  • CVE-2015-8556Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
    44Plan
  • CVE-2017-15118A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an…
    43Plan

Published before and after this one in the same product

  • ← EarlierCVE-2021-3611May 11, 2022 · A stack overflow vulnerability was found in the Intel HD Audio device (intel-hda) of QEMU.
    26Monitor
  • ← EarlierCVE-2022-35414Jul 10, 2022 · softmmu/physmem.c in QEMU through 7.0.0 can perform an uninitialized read on the translate_fail path, leading to an io_readx or io_writex…
    35Monitor
  • Later →CVE-2021-4158Aug 24, 2022 · A NULL pointer dereference issue was found in the ACPI code of QEMU.
    24Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:qemu1:7.1+dfsg-1 · Debian:12Package registry (OSV)
opensuse:qemu6.2.0-150400.37.14.2 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:qemu-linux-user6.2.0-150400.37.14.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:qemu-testsuite6.2.0-150400.37.14.1 · openSUSE:Leap 15.4Package registry (OSV)
suse:qemu3.1.1.1-66.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:qemu6.2.0-150400.37.14.2 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records