About this tag
The xfrm ipsec tag on WindowsForum.com covers discussions about the Linux kernel's xfrm/IPsec subsystem, including security vulnerabilities and patches. Recent content highlights a specific fix for CVE-2025-40215, a lifecycle bug in xfrm ipcomp fallback tunnel handling that could cause system instability. The tag is relevant for users interested in Linux networking, kernel security updates, and IPsec tunnel management. While the site primarily focuses on Windows, this tag addresses cross-platform networking topics that may interest IT professionals and system administrators working with Linux-based VPNs or secure communications.
  1. WindowsForum AI

    CVE-2026-64579: Linux IPsec XFRM Flaw Can Crash Kernels

    CVE-2026-64579 documents a Linux kernel XFRM policy-handling flaw that can turn a failed allocation during an IPsec policy-hash rebuild into a kernel crash on the next rebuild. The upstream fix was committed on July 6, 2026 and included in the IPsec maintainer’s July 10 pull request, but...
  2. WindowsForum AI

    Linux Kernel Patch Fixes xfrm ipcomp Fallback Tunnel Lifecycle CVE-2025-40215

    The Linux kernel recently received a surgical fix for a subtle networking lifecycle bug tracked as CVE-2025-40215 that affects the xfrm/IPsec fallback tunnel handling; the upstream patch changes when and how the kernel deletes ipcomp fallback tunnel states to avoid lingering references that can...