Incorrect Comparison in Netty - CVE-2026-44249

Vulnerability identifier: #VU133457

CSH Severity: High

CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-44249

CWE-ID: CWE-697

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass IPv6 subnet access controls.

The vulnerability exists due to incorrect comparison in IpSubnetFilterRule.compareTo() when evaluating IPv6 subnet rules. A remote attacker can use a valid public IP address to bypass IPv6 subnet access controls.

The issue is caused by applying a bitwise AND operation to the configured networkAddress instead of the subnetMask.

Netty
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Package Hub 15
Development Tools Module
Netezza Appliance
webMethods ControlPlane
webMethods developer portal
Guardium Data Protection
PowerVC
IBM SPSS Analytic Server
Jira Service Management Data Center
Crowd Data Center
IBM Sterling B2B Integrator
IBM Sterling Connect:Direct Web Services
Confluence Data Center
IBM Maximo Application Suite - Manage Component
Bitbucket Data Center
Jira Software Data Center
Bamboo Data Center
Red Hat build of Quarkus
Datastax Enterprise with IBM
IBM Sterling File Gateway
IBM DB2
IBM App Connect for Manufacturing
netty-tcnative
netty-tcnative-debugsource
netty
netty-javadoc
Red Hat Camel for Spring Boot
JBoss Data Grid

Install security update from vendor's website.

Netty - addressed in versions 4.1.135, 4.2.15
Netezza Appliance - update to 1.0.2.0
Jira Service Management Data Center - addressed in versions 10.3.24, 11.3.8
Crowd Data Center - update to 7.2.2
IBM Sterling B2B Integrator - addressed in versions 6.2.1.2.1, 6.2.2.1.1
IBM Sterling File Gateway - addressed in versions 6.2.1.2.1, 6.2.2.1.1
IBM Sterling Connect:Direct Web Services - addressed in versions 6.3.0.20, 6.4.0.9
Confluence Data Center - addressed in versions 9.2.24, 10.2.17
IBM Maximo Application Suite - Manage Component - addressed in versions 9.0.28, 9.1.20, 9.2.1
Bitbucket Data Center - addressed in versions 9.4.24, 10.2.6, 10.3.2
Jira Software Data Center - addressed in versions 9.12.38, 10.3.24, 11.3.8
Bamboo Data Center - addressed in versions 10.2.21, 12.1.9
webMethods ControlPlane - update to 11.1 Fix11
webMethods developer portal - update to 11.1 Fix14
IBM DB2 - update to 11.5.9 SU 90467
netty-tcnative - update to 2.0.79-150200.3.45.1
netty-tcnative-debugsource - update to 2.0.79-150200.3.45.1
netty - update to 4.1.135-150200.4.50.1
netty-javadoc - update to 4.1.135-150200.4.50.1
Red Hat build of Quarkus - addressed in versions 3.27.4.SP1, 3.33.2.SP1
Red Hat Camel for Spring Boot - update to 4.18
Datastax Enterprise with IBM - update to 6.9.24
JBoss Data Grid - update to 8.6.2
Guardium Data Protection - update to 12.0p150

• https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86

• Multiple vulnerabilities in Netty
• Multiple vulnerabilities in IBM SPSS Analytic Server
• SUSE update for netty, netty-tcnative
• IBM Sterling Connect:Direct Web Services update for Netty
• Multiple vulnerabilities in Bamboo Data Center
• IBM Maximo Application Suite - Manage Component update for Netty
• Multiple vulnerabilities in IBM App Connect for Manufacturing
• Multiple vulnerabilities in Red Hat Camel for Spring Boot 4
• Multiple vulnerabilities in JBoss Data Grid 8.6
• Multiple vulnerabilities in Crowd Data Center
• Multiple vulnerabilities in Jira Service Management Data Center
• Multiple vulnerabilities in Jira Software Data Center
• Multiple vulnerabilities in IBM webMethods API Management
• IBM Netezza Appliance update for Netty
• Multiple vulnerabilities in IBM Db2
• Multiple vulnerabilities in IBM Sterling B2B Integrator and IBM Sterling File Gateway
• Multiple vulnerabilities in Bitbucket Data Center
• Multiple vulnerabilities in Confluence Data Center
• Multiple vulnerabilities in IBM DataStax Enterprise
• Multiple vulnerabilities in Red Hat build of Quarkus 3.33.2
• Multiple vulnerabilities in Red Hat build of Quarkus 3.27.4
• IBM PowerVC update for Netty
• Multiple vulnerabilities in IBM Guardium Data Protection