UBUNTU-CVE-2021-42340

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-42340
Published: 14 Oct 2021, 20:15
Last modified:14 Jul 2025, 06:45

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

14 Oct 2021, 20:15
Published
Vulnerability first disclosed
14 Jul 2025, 06:45
Last Modified
Vulnerability information updated

Description

The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.

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•tomcat8

    all

  • ubuntu•tomcat9

    all | all | all | all

References (6)