Why Windows 11 25 H2 Updates Got Heavy
Автор: Tech World
Загружено: 2026-01-16
Просмотров: 87
Microsoft confirmed that Windows 11 version 25H2 updates became nearly twice as large because of a major security hardening change: the Common Log File System (CLFS) driver now uses hash-based message authentication codes (HMAC) to protect log files against tampering. This added cryptographic layer significantly increased update size but was deemed essential for enterprise-grade security.
🔐 Why the Update Got Heavier
CLFS Driver Security Mitigation:
Introduced in the November 2025 Patch Tuesday.
Adds HMAC (hash-based message authentication code) to CLFS log files.
Prevents malicious actors from altering or injecting data into system logs.
Impact on Update Size:
The cryptographic changes required restructuring of log file handling.
Result: update packages became almost twice as heavy compared to prior releases.
📌 Key Security Enhancements in Windows 11 25H2
Enterprise-focused improvements:
Memory-safety upgrades.
Runtime vulnerability mitigations.
Secure Boot certificate renewal preparedness.
Hotpatch Enablement:
Allows critical fixes to be applied without rebooting.
Streamlines servicing for enterprise environments.
Updated Security Baseline:
Better alignment with modern compliance standards.
New recommended configurations for enterprise customers.
#windows #windows11 #windowsupdates #microsoftnews #itadmin
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