High7.5Vendor: MediumRed Hat Linux

High [CVE-2026-30827] Denial of Service for IPv4 clients due to incorrect IPv6 subnet masking

This high-severity Red Hat Linux advisory covers CVE-2026-30827 affecting ansible-automation-platform-tech-preview/mcp-server-rhel9:1774268173, devspaces/openvsx-rhel9:1779528224, Red Hat Enterprise Linux.

CVE-2026-30827 Published Mar 7, 2026

CVE-2026-30827

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Denial of Service for IPv4 clients due to incorrect IPv6 subnet masking. Red Hat rates this moderate (CVSS 7.5).

Weakness: CWE-1389. Affected package(s): ansible-automation-platform-tech-preview/mcp-server-rhel9:1774268173, devspaces/openvsx-rhel9:1779528224.

Resolved in Red Hat advisory RHSA-2026:6309 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux.

Affected versions

ansible-automation-platform-tech-preview/mcp-server-rhel9:1774268173
devspaces/openvsx-rhel9:1779528224

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

Fixed versions

RHSA-2026:6309

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-2026:6309 (`sudo dnf update` / `yum update`).

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

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