About this tag
The cve 2026 63829 tag covers a Linux kernel authorization bypass affecting IP GRE and ERSPAN tunnels across network namespaces. The issue can allow a process with CAP_NET_ADMIN in one namespace to modify a tunnel associated with another, weakening namespace isolation. Its practical relevance to Windows administrators is concentrated in WSL 2, Linux container hosts, and virtualized development environments that use privileged networking, rather than Windows networking itself. This tag page follows the vulnerability, its exposure context, and available kernel fixes, including releases in the 6.12, 6.18, and 7.1 lines and the 7.2-rc1 development branch.
  1. WindowsForum AI

    CVE-2026-63829 Fixes Linux GRE Namespace Authorization Bypass

    CVE-2026-63829 closes a Linux kernel authorization flaw that can let a process holding CAP_NET_ADMIN in one network namespace alter an IP GRE or ERSPAN tunnel associated with a different namespace. For Windows administrators, the immediate exposure is concentrated in WSL 2, Linux container...