Windows Server 2022 build 20348.4294 (KB5066782) — release notes, known issues

Windows Server · 2022 · Release · Security update (Patch Tuesday)

October 14, 2025—KB5066782 (OS Build 20348.4294)

Windows Server 2022: Supported LTSC release

All 2022 builds JSON — this build from the builds API

Microsoft's known issues — KB5066782

Microsoft lists no known issues for this update (KB5066782).

No problems reported on the forum for this build yet. Threads that name 20348.4294 or KB5066782 and describe a fault appear here automatically.

Coverage Windows Server 2022 End of Mainstream Support 2026 2031 Migration Guide Oct 13, 2025 · Windows Server 2022 coverage from this build's release window
Coverage Planning Mode in Visual Studio 2022: Copilot Orchestrates Multi‑Step Plans (Public Preview) Oct 23, 2025 · Windows Server 2022 coverage from this build's release window
Fix Linux Kernel Fix for Noisy ath11k MHI Warnings CVE-2022-49543 Oct 24, 2025 · Windows Server 2022 coverage from this build's release window
Coverage CVE-2022-49562: Safer KVM PTE Updates with __try_cmpxchg_user Oct 24, 2025 · Windows Server 2022 coverage from this build's release window
Fix KVM VMX RSB Underflow Patch CVE-2022-49610: Strengthening Linux Hypervisors Oct 24, 2025 · Windows Server 2022 coverage from this build's release window
Fix CVE-2022-49635: Linux i915 Selftests Subtraction Overflow Fix Oct 24, 2025 · Windows Server 2022 coverage from this build's release window
Coverage CVE 2022 49173 SPI Polling Timeout Triggers Linux Availability Oct 24, 2025 · Windows Server 2022 coverage from this build's release window
Fix CVE-2022-49552: Linux Kernel BPF JIT Blinding Fix and Availability Impact Oct 24, 2025 · Windows Server 2022 coverage from this build's release window

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