Public proof of conceptFix available

CVE-2020-14364

A public proof of concept exists; no exploitation attested.

Published2020-08-31
WeaknessCWE-125 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.

Timeline

dates in UTC

2020-08-3118:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-14364?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-14364?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
16.4	= 16.04	no fix published	NVD
18.4	= 18.04	no fix published	NVD
20.4	= 20.04	no fix published	NVD

Redhat enterprise linux

Branch	Affected	Fixed in	Source
6.0	= 6.0	no fix published	NVD
7.0	= 7.0	no fix published	NVD
8.0	= 8.0	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
9.0	= 9.0	no fix published	NVD
10.0	= 10.0	no fix published	NVD

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

libiscsiAlmaLinux:8all versions · fixed in 1.18.0-8.module_el8.3.0+2048+e7a0a3eaand 2 other packages
libiscsiAlmaLinux:8all versions · fixed in 1.18.0-8.module_el8.5.0+2608+72063365and 2 other packages
libiscsiAlmaLinux:8all versions · fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703and 2 other packages
netcfAlmaLinux:8all versions · fixed in 0.2.8-12.module_el8.3.0+2048+e7a0a3eaand 2 other packages
netcfAlmaLinux:8all versions · fixed in 0.2.8-12.module_el8.5.0+2608+72063365and 2 other packages
netcfAlmaLinux:8all versions · fixed in 0.2.8-12.module_el8.6.0+2880+7d9e3703and 2 other packages
sgabiosAlmaLinux:8all versions · fixed in 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea
sgabiosAlmaLinux:8all versions · fixed in 1:0.20170427git-3.module_el8.5.0+2608+72063365and 1 other package

1 more package range on OSV.dev

Full record on NVD

Fix

Advisories and patches

bugzilla.redhat.comPatch

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedgejian-iscas/CVE-2020-14364y-f00l/CVE-2020-14364

Sources

NVDCVSS 3.15read 2026-10-23
NVDCVSS 2.04.4read 2026-10-23
CNAweakness (CWE)CWE-125read 2026-10-23
NVDweakness (CWE)CWE-125, CWE-787read 2026-10-23
FIRST EPSSEPSS score5.4 %2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
Published: 2020-08-31
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-14364?

Is CVE-2020-14364 actively exploited?

Active exploitation of CVE-2020-14364 has not been confirmed. Its EPSS score was 5.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-14364?

CVE-2020-14364 has a CVSS v3 base score of 5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L.

Running netcf? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database