Use After Free Affecting usbredir package, versions <0.11.0-1


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.31% (24th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-USBREDIR-20028301
  • published21 Sept 2026
  • disclosed24 Feb 2022

Introduced: 24 Feb 2022

CVE-2021-3700  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Echo:latest usbredir to version 0.11.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream usbredir package and not the usbredir package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c. This issue occurs when serializing large amounts of buffered write data in the case of a slow or blocked destination.

CVSS Base Scores

version 3.1