UBUNTU-CVE-2021-41039

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2021-41039
Downstream
USN-6492-1
Published: 01 Dec 2021, 20:15
Last modified:22 Apr 2026, 13:00

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Dec 2021, 20:15
Published
Vulnerability first disclosed
22 Apr 2026, 13:00
Last Modified
Vulnerability information updated

Description

In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•mosquitto

    < 1.6.9-1ubuntu0.1~esm1 | < 2.0.11-1ubuntu1.1

References (4)