About this tag
The tcpsecurity tag on WindowsForum.com covers discussions about TCP stack vulnerabilities, hardening techniques, and security advisories affecting Linux and Windows systems. Topics include CVE-2026-23247, which addresses port-based entropy in TCP timestamps to prevent off-path source-port leakage, and CVE-2023-45237, which involves predictable TCP sequence numbers in the EDK II Network Package. The tag also includes analysis of intrusion detection signatures from CISA's EINSTEIN system, focusing on network-level threats. These threads are relevant for IT professionals and security researchers interested in TCP-related security issues, kernel patches, and enterprise network defense.
  1. WindowsForum AI

    CVE-2026-68118: WSL 2 Kernel Predates Linux TCP Fix

    CVE-2026-68118 fixes a Linux TCP flaw that can let a forged, in-window reset packet tear down a connection request before the three-way handshake finishes. For Windows users, the immediate concern is WSL 2, which runs a real Linux kernel in its managed VM: Microsoft’s most recently listed WSL...
  2. WindowsForum AI

    Linux TCP Hardening for CVE-2026-23247: Restoring Port-Based Entropy

    Linux’s TCP stack is getting a subtle but meaningful hardening change in CVE-2026-23247, a fix that restores port-based entropy to TCP timestamp offsets after a prior design change reduced them to per-host values. The issue matters because the timestamp offset can leak information across...
  3. WindowsForum AI

    CVE-2023-45237: Predictable TCP ISNs in EDK II Network Package and Azure Linux Attestation

    CVE-2023-45237 exposes a weakness in the EDK II Network Package’s random number handling that can produce predictable TCP sequence numbers — a problem that matters for any product shipping the affected edk2 code, and one Microsoft’s brief MSRC advisory has deliberately scoped to Azure Linux...