Allocation of Resources Without Limits or Throttling in Netty - CVE-2026-33871

Vulnerability identifier: #VU124423

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-33871

CWE-ID: CWE-770

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to allocation of resources without limits or throttling in the "DefaultHttp2FrameReader" function within HTTP/2 server. A remote attacker can send a flood of CONTINUATION frames and cause a denial of service condition on the target system.

Netty
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Package Hub 15
Development Tools Module
openSUSE Leap
IBM SPSS Analytic Server
IBM Decision Optimization for Cloud Pak for Data
IBM Watson Discovery for IBM Cloud Pak for Data
Jira Service Management Data Center
IBM Sterling Partner Engagement Manager
Confluence Data Center
Bitbucket Data Center
Jira Software Data Center
Bamboo Data Center
IBM Automation Decision Services
Red Hat Integration Camel Extensions for Quarkus
DataStage on Cloud Pak for Data
Storage Protect Server
IBM DB2
Keycloak
netty-tcnative
netty-tcnative-javadoc
netty-tcnative-debugsource
netty
netty-javadoc
Red Hat Camel for Spring Boot
JBoss Data Grid

Install updates from vendor's website.

Netty - addressed in versions 4.1.132, 4.2.11
IBM Decision Optimization for Cloud Pak for Data - update to 5.3.1 patch 4
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.3.2
DataStage on Cloud Pak for Data - update to 5.4
Jira Service Management Data Center - addressed in versions 10.3.22, 11.3.5
IBM Sterling Partner Engagement Manager - addressed in versions 6.2.3.6, 6.2.4.4
Confluence Data Center - addressed in versions 9.2.19, 10.2.10
Bitbucket Data Center - addressed in versions 9.4.22, 10.2.4, 10.3.1
Jira Software Data Center - addressed in versions 9.12.28, 10.3.22, 11.3.5
Bamboo Data Center - addressed in versions 10.2.18, 12.1.6
IBM Automation Decision Services - addressed in versions 24.0.0.0.9, 24.0.1.0.8, 25.0.0.0.4
Keycloak - update to 26.6.2
Red Hat Integration Camel Extensions for Quarkus - update to p
netty-tcnative - update to 2.0.75-150200.3.36.1
netty-tcnative-javadoc - update to 2.0.75-150200.3.36.1
netty-tcnative-debugsource - update to 2.0.75-150200.3.36.1
netty - update to 4.1.132-150200.4.43.1
netty-javadoc - update to 4.1.132-150200.4.43.1
Red Hat Camel for Spring Boot - update to 4.14
Storage Protect Server - update to 8.2.2
JBoss Data Grid - update to 8.6.1

• https://github.com/netty/netty/security/advisories/GHSA-w9fj-cfpg-grvv

• Multiple vulnerabilities in Netty
• SUSE update for netty, netty-tcnative
• Bamboo Data Center update for netty-codec-http2 DoS
• Confluence Data Center update for netty-codec-http2
• IBM Watson Discovery Cartridge update for Netty
• Multiple vulnerabilities in IBM SPSS Analytic Server
• Multiple vulnerabilities in IBM Decision Optimization for Cloud Pak for Data
• Multiple vulnerabilities in JBoss Data Grid 8.6
• Multiple vulnerabilities in Jira Service Management Data Center and Jira Service Management Server
• Multiple vulnerabilities in Jira Software Data Center
• Multiple vulnerabilities in IBM DataStage on Cloud Pak for Data
• Multiple vulnerabilities in IBM Db2
• Multiple vulnerabilities in IBM Sterling Partner Engagement Manager
• Multiple vulnerabilities in Bitbucket Data Center
• IBM Storage Protect Server update for Netty
• Multiple vulnerabilities in IBM Automation Decision Services
• Multiple vulnerabilities in Red Hat Integration Camel Extensions for Quarkus
• Multiple vulnerabilities in Red Hat Camel for Spring Boot 4
• Multiple vulnerabilities in Keycloak