UBUNTU-CVE-2020-11996

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2020-11996
Downstream
USN-4596-1
Published: 26 Jun 2020, 17:15
Last modified:04 Feb 2026, 03:49

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

26 Jun 2020, 17:15
Published
Vulnerability first disclosed
04 Feb 2026, 03:49
Last Modified
Vulnerability information updated

Description

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

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 | < 9.0.31-1ubuntu0.1

References (16)