High8.1Red Hat Linux

High [CVE-2026-44249] IPv6 subnet rule bypass due to incorrect masking operation

This high-severity Red Hat Linux advisory covers CVE-2026-44249 affecting Red Hat Offline Knowledge Portal 1.2.7, Red Hat OpenShift Dev Spaces 3.29, OpenShift Serverless.

CVE-2026-44249 Published Jun 11, 2026

CVE-2026-44249

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

IPv6 subnet rule bypass due to incorrect masking operation. Red Hat rates this important (CVSS 8.1).

Weakness: CWE-1287. Affected package(s): netty-handler, offline-knowledge-portal/rhokp-rhel9:1782239370.

Resolved in Red Hat advisory RHSA-2026:26586 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Offline Knowledge Portal 1.2.7; Red Hat OpenShift Dev Spaces 3.29; OpenShift Serverless; Red Hat AMQ Broker 7; and 23 more.

Affected versions

netty-handler
offline-knowledge-portal/rhokp-rhel9:1782239370

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:26586

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:26586 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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