202310 Cumulative Update For Windows 11 For X64based Systems Kb5031358 Exclusive [verified] May 2026

Windows 11 October 2023 Update: An Exclusive Deep Dive into KB5031358

Date: October 10, 2023 Target: Windows 11, version 22H2 (x64-based systems) Build Revision: OS Build 22621.2428

Updated the spelling of Ukraine’s capital from Kiev to Kyiv and added support for Greenland's daylight saving time changes. Windows 11 October 2023 Update: An Exclusive Deep

| CVE ID | Severity | Description | |--------|----------|-------------| | CVE-2023-36584 | Important | Windows Mark of the Web (MOTW) security feature bypass. An attacker could craft a malicious file that doesn’t get the MOTW label, bypassing SmartScreen warnings. | | CVE-2023-41763 | Important | Windows Cloud Files Mini Filter Driver privilege escalation. | | CVE-2023-44487 | Important | HTTP/2 Rapid Reset Attack (protocol vulnerability) – Windows mitigations added for this DDoS attack vector. | Moment 4 features (partially enabled – requires separate

Note on "Exclusive" x64 Binary:

The x64 version contains a digitally signed binary ntoskrnl.exe with checksum different from the x86 emulation layer on Arm64. Do not attempt to cross-deploy. 2023 Target: Windows 11

Feature Updates (non‑security):

• Moment 4 features (partially enabled – requires separate enablement package). KB5031358 includes underlying plumbing for:

  Persistent Failures: Some users reported that even a full PC wipe and clean install did not resolve the installation error.

  Since this was the final update for version 21H2, users are strongly encouraged to upgrade to Windows 11 22H2 or newer to continue receiving security protection.

  , introducing centralized AI assistance to the platform's integrated UI. Compliance