KubeVirt v1.8.4

This maintenance release focuses on critical stability and security. It resolves a significant memory leak in virt-handler, patches a security vulnerability in the networking stack, and expands the observability of KubeVirt components through new metrics and alerts.

Fixed gRPC connection leak in virt-handler launcher client — Eliminates a critical memory and socket leak in virt-handler that could previously lead to node instability or OOM events when multiple controllers interacted with the same VM instance.

Address CVE-2026-35469 via spdystream update — Protects your infrastructure by patching a known vulnerability (GHSA-pc3f-x583-g7j2) in the underlying stream handling library.

Enhanced monitoring with new metrics and recording rules — Improves operational awareness by providing more granular health data and automated alerts for core KubeVirt components.

Improved CPU feature detection in node-labeller — Ensures more accurate CPU feature detection on nodes, which helps in better scheduling and optimizing VM performance across various hardware types.